Cmos schmitt trigger. Understanding Schmitt triggers and how they .

Cmos schmitt trigger. T and − T are the switching thresholds, and M and − M are the output voltage levels. Complementary MOS Schmitt trigger is analyzed with the conventional Schmitt trigger in terms of power, slew rate and hysteresis at various technologies and temperatures. The layout of the current sink logic structures based Schmitt trigger circuit is shown in Fig. Abstnrct-CMOS Schmitt trigger design with given circuit thresholds is described. #VLSI #CMOS #IITJammu #MOSFET #VLSIDesign #DigitalVLSI The objective of this course is to understand the fundamental of VLSI circuit designs and related para CMOS Schmitt Trigger Figure 15: CMOS Schmitt Trigger CMOS technology significantly improves Schmitt triggers by enabling them to operate at lower power levels. A Schmitt trigger is a A multivibrator that produces uniform-amplitude output pulses from a variable amplitude input signal. In this paper, CMOS based Schmitt Trigger circuits have been considered using the one pMOS two layer feedback approach and an nMOS only Schmitt Trigger with voltage enhancer procedure. 3 V input signals. In Proceedings of the 2004 International Symposium on Circuits and Systems, Vancouver, BC, Canada, 23–26 May 2004; pp. The circuit is designed and simulated using DSCH and MICROWIND tools for different CMOS technologies. It can also generate a square as well as a triangle wave. Full pinout diagram and simple explanations inside. Jun 16, 2021 · Understanding the Schmitt trigger circuit using CMOS inverters Ask Question Asked 4 years, 4 months ago Modified 1 year, 8 months ago Sep 3, 2023 · Schmitt Trigger A Schmitt trigger is an important electronic device known for two fundamental properties: Fast Signal Response: It transforms a slowly changing input waveform into a digital output signal with rapid transitions. A Schmitt-trigger device has a hysteresis band between two input threshold voltages. In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential CMOS Schmitt trigger design with given circuit thresholds is described. Basically a Schmitt trigger is a circuit which could simply have CMOS Schmitt trigger is a widely used circuit in numerous applications including those for removing noise from signals, to speed up slow edge signals and in the design of oscillators. The difference in these switching points is called Hysteresis (^Vt). Results indicate that the CMOS Schmitt trigger effectively sharpens slowly varying waveforms and demonstrates significant noise rejection capabilities. Transfer function of a Schmitt trigger. In section IV comparison between conventional Schmitt trigger and new Schmitt trigger on the basis of hysteresis width, static power dissipation and dynamic power dissipation is discussed. Complementary MOS Schmitt trigger is analyzed with the conventional Schmitt trigger in terms of The true Schmitt trigger input has the switching threshold adjusted where the part will switch at a higher point (Vt+) on the rising edge and at a lower point (Vt–) on the falling edge. e. 573–576. 5V. May 28, 2024 · What is a Schmitt Trigger? A Schmitt trigger is a comparator (not exclusively) circuit that makes use of positive feedback (small changes in the input lead to large changes in the output in the same phase) to implement hysteresis (a fancy word for delayed action) and is used to remove noise from an analog signal while converting it to a digital one. A comparative analysis of different CMOS Schmitt trigger designs has been provided. The ST hysteresis, caused by the added positive Aug 23, 2016 · This paper proposes a novel differential CMOS Schmitt trigger with adjustable hysteresis. To see how a Schmitt trigger might be useful, we will construct a source with some fake noise introduced into it. la. This circuit has many applications, one being the conversion of a sine wave into a A new proposed CMOS Schmitt Trigger is presented which is capable to function under low voltages as much as 0. For a slowly rising or falling input A Schmitt trigger is used for converting analog value to a binary value, but reducing noise compared to a simple comparator. The horizontal and vertical axes are input voltage and output voltage, respectively. The approach is based on studying the transient from one stable state to another when the trigger is in linear operation. It means that M1 is ON thus the source of M2 is conducting Vdd hence M2 is On as well. The prototype circuit consists of six transistors arranged in a complementary CMOS structure. CMOS Schmitt trigger design with given circuit thresholds is described. In this paper, a review on the advancement of Schmitt trigger circuits are illustrated in different literatures is discussed with their merits and demerits. The complete DC voltage transfer characteristic of the CMOS ST is determined. Hysteresis: Its voltage-transfer characteristic exhibits different switching thresholds for positive and negative input signals. The design along with the working principle for each Schmitt trigger architecture is discussed. This repository presents the analog IC design and implementation of a CMOS Schmitt Trigger circuit. It converts noisy or slowly varying analog inputs into clean digital outputs, ensuring reliable transitions. A standard topology of the trigger is used, but the classical design equations are inapplicable due to the different 4H-SiC MOSFETs electrical behaviours compared to silicon ones, like high traps density at oxide/semiconductor interface. 18 μm 0. It uses positive feedback to shift the threshold dynamically based on the output state. This behavior is achieved through two distinct threshold Jan 31, 2021 · A SIMPLE explanation of Schmitt Triggers. A Schmitt trigger is a buffer used to convert a slow or noisy signal into a clean one before passing it to the FPGA. The Schmitt Trigger is a comparator circuit that incorporates positive Detailed qualitative analysis of the workings of the CMOS Schmitt trigger. What does it do? A Schmitt trigger is a decision-making circuit. Commonly built using op-amps or comparators Jun 30, 1991 · Three adjustable Schmitt triggers for implementation in CMOS technology are presented: two semi-adjustable circuits using only six transistors and one fully adjustable circuit using a total of eight transistors. 8V to 1. The key features of a Schmitt trigger are: It has two threshold voltages – an upper threshold voltage (VTH) and a lower threshold voltage (VTL) The output switches cleanly between low and high states depending on whether the input is above VTH or Understanding Schmitt Triggers Most CMOS, BiCMOS and TTL devices require fast the input. In this research a Schmitt Trigger is designed to function at low voltage. 10 and the overall area occupied by it is 82. One consists of three NMOS transistors and one PMOS transistor, while the other consists of one NMOS and three PMOS transistors. The hysteresis of the proposed circuit is generated using cross-coupled pMOS or nMOS transistors, which 施密特觸發器是由美國科學家 奧托·赫伯特·施密特 （Otto Herbert Schmitt）於1934年發明，當時他只是一個研究生， [1] 後於1937年他在其博士論文中將這一發明描述為「熱電子觸發器」（thermionic trigger）。 [2] 這一發明是施密特對 魷魚 神經中的神經脈波傳播進行研究的直接成果。 Sep 8, 2024 · In Vivado, when you configure the PS MIO pins in a Zynq Ultrascale\+ MPSOC, you get a "I/O type" choice of Schmitt or CMOS. The true Schmitt trigger input has the switching threshold adjusted where the part will switch at a higher point (Vt+) on the rising edge and at a lower point (Vt–) on the falling edge. Schmitt trigger circuits - very much like Schmitt inverters - can also be made from Op-Amps. Small-signal analysis is carried out to determine the minimum supply Each circuit functions as a two-input NAND gate, with Schmitt-trigger action on both inputs. The CMOS device has high output drive while maintaining low static power dissipation over a broad VCC operating range. Hence, design a layout circuit in 2D Mar 25, 2025 · Build and test CD40106 Schmitt trigger circuits, including LED flasher and pulse cleaner. 78 μm2. This implementation is done on Sysnopsys Custom Compiler tool and libraries available on cloud platform using 28nm technology. Overview Adjustable hysteresis CMOS Schmitt trigger design strategies are investigated and two new inverter based designs are proposed. Sep 1, 2021 · Hysteresis in a CMOS Schmitt trigger Ask Question Asked 9 years ago Modified 4 years, 2 months ago May 23, 2018 · This article is intended to help readers understand the good and the bad traits of Schmitt Trigger RC oscillators, which are especially important because they are present in the internal oscillator in popular MCUs. The sizing of the two feedback inverters controls the two trip points of the structure independently. However, document DS925: Zynq UltraScale\+ MPSoC Data Sheet: DC and AC Switching Characteristics, only defines the DC characteristics for the three LVCMOS I/O types, not Schmitt. Moreover the May 27, 2011 · This paper presents a low voltage adjustable CMOS Schmitt trigger using dynamic threshold MOS (DTMOS). The paper explores the design and scrutiny of low power techniques. In this design, a dynamic body-bias is applied to a simple CMOS inverter circuit, whereby the threshold voltages of the two MOSFETs can be changed, thus changing the switching voltage. 13 μm 1/2. All of the standard logic gates are available as Schmitt input logic gates - the output responds to changes in the input voltage differently depending on whether the input voltage is rising or falling. Describes what a Schmitt Trigger is and how a CMOS Schmitt Trigger circuit is built. [10] reported low power CMOS Schmitt trigger in which sources of pullup and pull down network tied together with one additional PMOS and NMOS transistors as shown in Fig. The trigger switches at different points for positive- and negative-going signals. 65V to 5. Two variants of CMOS Schmitt triggers, consisting of only four enhancement-type MOS transistors, are proposed in the paper. Analysis and Sizing of the Schmitt Trigger. This prevents false triggering from noise or slow signal transitions. Fig. Sep 29, 2002 · Sarawai et al. This article examines the performance degradation in a CMOS Schmitt trigger circuit over a The CD4093 is a CMOS chip with four NAND gates with Schmitt trigger which makes it usable to for example build oscillators (and synthesizers) Jul 22, 2017 · The Schmitt trigger makes an upper and lower threshold to a wave to make triggering a device's ON and OFF states easier. This paper presents the performance analysis of various CMOS Schmitt triggers which are used in the VLSI industry for noise reduction. Ib and c represent two variants of the first type with less hysteresis width. The Schmitt trigger is widely used in various electronic applications due to its ability to provide clean and stable output transitions, even in the presence of noisy or slowly changing Nov 29, 2023 · A CMOS Schmitt trigger based on 4H-SiC CMOS 2 \ (\mu m\) technology is presented. The circuit is designed in 65 nm CMOS standard process but can be implemented in any other technology. 2). I am assuming "Schmitt" is short for Schmitt Trigger thresholding but this is not stated Using Schmitt-Trigger Buffers to Reduce the Slew Rate One way to eliminate problems with low slew rate is with external Schmitt triggers. Aug 22, 2009 · This paper presents a brief overview of Schmitt triggers and proposes a new differential current-feedback Schmitt trigger. Hysteresis Download scientific diagram | CMOS Schmitt Trigger from publication: A Novel Low Power High Dynamic Threshold Swing Limited Repeater Insertion for On-Chip Interconnects | In Very Large Scale Sep 21, 2012 · Schmitt triggers. This white paper focuses on understanding the importance of transition rate for CMOS (Complementary Metal Oxide Semiconductors) inputs for logic and translation devices. Each circuit functions as an inverter with Schmitt-Trigger input. This paper conduct a comparative assessment of different CMOS Schmitt trigger designs, delving into their respective architectures and operational principles. The trigger is subdivided into two subcircuits; Understanding Schmitt Triggers Most CMOS, BiCMOS and TTL devices require fast the input. Hysteresis Explore CMOS Schmitt trigger design, advantages, and applications. Aging related degradation in CMOS circuits is a key concern which limits their performance over longer periods (years). Aug 4, 2020 · A Schmitt trigger acts like an amplifier/comparator with hysteresis where hysteresis is controlled by adjusting the collector resistance in two transistors. This paper also provides an overview of Schmitt trigger circuits, their evolution into CMOS Schmitt Triggers [3], and existing designs with their associated limitations. A Jul 11, 2007 · A simple logical threshold voltage control circuit is proposed that can be implemented using normal conventional CMOS inverters and applications to the Schmitt trigger circuit with controllable hysteresis and a window comparator are shown. Understanding Schmitt triggers and how they Abstract— Adjustable hysteresis CMOS Schmitt trigger design strategies are investigated and two new inverter based designs are proposed. The low voltage is optimized for 0. The two operating points Vth+ and Vth- are evaluated with respect to the supply voltages at different technologies and temperature. Apr 10, 2025 · Schmitt Trigger Circuits (STCs) play a crucial role in digital and analog signal processing by providing noise immunity and stable switching behavior. Abstnrct-CMOS Schmitt trigger design with given circuit thresholds is described. to operate in the sub threshold region for the reduced power supply consumption, thereby causing the performance deterioration of the circuit in terms of the noise immunity. me/ Aug 30, 2024 · Introduction to Schmitt Trigger A Schmitt trigger is a type of comparator circuit that incorporates positive feedback to achieve hysteresis. The The document discusses the design of a CMOS Schmitt trigger, focusing on the relationships between device sizes and circuit thresholds during transitions between stable states. The circuit diagram for a Schmitt Trigger Schmitt trigger is an important element in digital circuits and provides noise protection and hysteresis for signal amplification. If Q3 is removed, this circuit becomes a NMOS NAND gate with both inputs tied Aug 14, 2018 · This study compares the performance and reliability of classical complementary metal-oxide-semiconductor (CMOS) gates with Schmitt trigger (ST) ones. Schmitt, who invented the concept in 1934. How CMOS Schmitt trigger circuit design and prototyping: Fig. . Here, a schmitt trigger is implemented and simulated using 28nm CMOS process and synopsys custom compiler. In the case of an IC with hysteresis, the positive-going threshold voltage (V(P)) differs from the negative-going threshold voltage (V(N)). Apr 12, 2025 · Learn about Schmitt trigger using digital CMOS ICs, together with its hysteresis, substitution with a normal gates chip, and how to use them. The study includes a comprehensive discussion of the design intricacies of each Schmitt trigger The study evaluates the Schmitt trigger's performance in terms of power, slew rate, and threshold voltages across various temperatures and technologies. By the addition of voltage controlled current sinking and/or sourcing transistors, the hysteresis window can be easily moved without changing its width. A Schmitt trigger is used for converting analog value to a binary CMOS Schmitt Trigger explained in Tamil VLSI DESIGNECEJoin our groups below for Subject notes, doubts clarifications and suggestions:Telegram:- https://t. A Schmitt Trigger is a bistable circuit that introduces hysteresis to input signals. Applications to the Schmitt trigger circuit with controllable hysteresis and a window comparator are shown to demonstrate May 31, 2020 · In this post we learn how to make simple and easy hobby circuits using any NAND gate IC such as IC 4011, IC 7400 or IC 4093 What is a Schmitt Trigger A Schmitt trigger is a quite simple kind of circuit, but it is amongst the most successful of all electronic building blocks and is largely utilised in home constructor projects. Aug 1, 2021 · In this paper, an ultra-low-voltage differential Schmitt trigger with two configurations of voltage-mode and current-mode is proposed. The use of complementary metal-oxide-semiconductor (CMOS) technology in Schmitt triggers takes advantage of CMOS components' low complementary MOS Schmitt trigger using CMOS 130nm in. The difference between the positive-going voltage (V P) and the negative-going voltages (V N) is defined as hysteresis voltage (V H). The designed Sc… CD4093B consists of four Schmitt-trigger circuits. The noise can cross the threshold multiple edges on the high and low transitions of their inputs. Feb 8, 2024 · The CMOS Schmitt trigger design is performed with given circuit thresholds where the transient from one stable state to another happens when the trigger is in linear operation. The center of the hysteresis can also be adjusted by varying the common-mode input voltage. The gate switches at different points for positive- and negative-going signals. However, optimizing STC performance for low-powe This video talks about the CMOS Schmitt trigger which is a circuit useful in generating clean pulses from a noisy input signal or in the designing of oscillator circuits. The most significant features of all three are the hysteresis adjustment, two operation modes as a comparator or Schmitt trigger, very small chip area, and very low static power Mar 26, 2024 · A Schmitt trigger and CMOS (Complementary Metal-Oxide-Semiconductor) are two different types of circuits commonly used in digital electronics for signal processing and voltage level shifting. The simulation results Abstract Schmitt triggers are electronic comparators that are widely used to enhance the immunity of circuits to noise and disturbances and are inherent components of various emerging applications. The new Schmitt trigger described in this work contains only 7 MOS transistors of type 1. Schmitt trigger What is a Schmitt Trigger ? A Schmitt Trigger is a comparator circuit with hysteresis, meaning it has two different threshold voltages for rising and falling input signals. The CD40106B device consists of six Schmitt-Trigger inputs. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. This single Schmitt-trigger buffer is designed for 1. The CMOS Schmitt trigger design is performed with given circuit thresholds where the transient from one stable state to another happens when the trigger is in linear operation. 4 V CMOS technology and analyzed using PSPICE with BSIM3V3 device models. The difference between the positive-going voltage (VP) and the negative-going voltages (VN) is defined as hysteresis voltage (VH). The approach is based on studying the transient from one stable state to another when the trigger is in linear operation The Schmitt trigger layouts are laid out with optimized sizing and spacing in compliance to the design rules of gpdk-180 nm CMOS process. The simulations have been carried out in SPICE A new Schmitt trigger circuit in a 0. It is named after Otto H. The following shows the input and output waveforms of a Schmitt inverter with an input threshold hysteresis. The proposed Schmitt trigger has been designed using 0. I couldn't find a YouTube video explaining the CMOS Schmitt trigger in detail, so As the world is currently heading towards an era of prolonged battery life which has forced the chip designers to go for the scaling down of the supply voltage i. In this paper, a review on the advancement Aug 15, 2025 · This triangle wave generator circuit uses CMOS gates as an astable multivibrator. The experimental results are presented in Section IV. 5V VCC operation. 8 V CMOS Schmitt trigger [4], and in 2020, a sub-threshold differential Schmitt trigger based on body bias technique [8] was proposed in which by operating with smaller power supplies and consuming lower power, the hysteresis width variation was also wider compared to the previous similar works. Learn about hysteresis, noise immunity, and circuit implementations. Each circuit functions as a two-input NAND gate with Schmitt-trigger action on both inputs. 1 (b). The following gure shows how to do this using two sine waves and a second op amp, used as a summing ampli er. 1 shows the proposed 1 V Schmitt trigger circuit. 8V. The hysteresis width is clear and less sensitive to the variation of load capacitance and source voltages. In this paper, we designed, 45nm low power CMOS design technology Schmitt trigger and achieved a modified FinFET method to reduce power consumption in 6 and 4 transistor circuits. Cross-coupled inverter with body control is employed to speed up the switching process, and control the intensity of the feedback. The Schmitt trigger could be built from discrete devices to satisfy a particular parameter, but this is a careful and sometimes time-consuming design. The simulation result must be in square form for both input voltage and output voltage. Nov 19, 2024 · Let's Explore Schmitt Trigger Circuit, a comparator with hysteresis used for signal conditioning, noise reduction, and shaping waveforms. 0V standard-Vt. Assuming we start with low Vin hence Vout is high. So, comes the need of such a circuit which can be used as Schmitt trigger design This article shows how to design a Schmitt trigger using transistors, how to improve the basic design, and why it might sometimes be the best approach. If the edges are too slow, they can cause excessive current, oscillation, or may damage the device. Dec 22, 2016 · In this paper, the classical CMOS Schmitt trigger (ST) operating in the subthreshold regime is analyzed. It can be implemented using normal conventional CMOS inverters. By the addition of voltage controlled current sinking and/or sourcing transistors, the hysteresis window can be easily moved without changing its width Apr 14, 2022 · I have some questions on how the schmitt trigger works. A CMOS (Corresponding Metal-Oxide-Semiconductor) Schmitt Trigger is an electronic circuit that uses CMOS to make a Schmitt Trigger with exceptionally low power utilization. The NL17SH17 is a single gate CMOS Schmitt−trigger non−inverting buffer fabricated with silicon gate CMOS technology. The trigger is subdivided into two subcircuits; each of them is considered as a passive load for the other. The hysteresis of the proposed Schmitt trigger is generated using regenerative current feedback and can be adjusted by varying the current of the regenerative feedback network. Here is an example of Schmitt trigger specs. Otto Schmitt The Schmitt trigger, like many circuits, was named after its inventor, Otto Schmitt. This allows the relations governing the deviations of the circuit thresholds from their given Nov 13, 2024 · The Schmitt trigger is named after American scientist Otto H. 74C14 (CMOS, similar to the 4000-series) 74HC14 (High-speed CMOS) 74HCT14 (High-speed CMOS, TTL compatible) 74LS14 (High-speed TTL) 74LVC14 (Low Voltage TTL) 74AC14 (Advanced CMOS) 74ALS14 (Advanced Low-Power Schottky TTL) 74F14 (Very High Speed) Note that some manufacturers also add a prefix, such as the SN74HC14 and SN74LS14 by Texas Instruments. At last comparison between all the architectures with respect to parameters like Low power prototype CMOS Schmitt trigger circuit: The prototype lower power Schmitt trigger circuit is shown in Fig. If you’re designing a module or IC as a high-frequency Schmitt trigger, you need the right simulation tools to evaluate your design for generating a pulse stream. On the other hand, the depletion A CMOS Schmitt trigger circuit is proposed to reduce power consumption and improve noise immunity. This allows the relations governing the deviations of the circuit thresholds from their given 1 Introduction A very simple circuit for a CMOS Schmitt trigger, consist-ing of four MOS transistors, has been proposed in Refer-ence 1. May 20, 2019 · This paper entitles the implementation of a complementary MOS Schmitt trigger using CMOS 130nm in. 5 V CMOS process to receive 3. It introduces a method for determining device sizes based on threshold tolerances and provides equations to analyze the circuit's behavior. Schmitt-trigger devices. The findings aim to enhance the design process for achieving precise threshold Sep 5, 2024 · This circuit is an inverting NMOS Schmitt trigger. Schmitt who invented it in 1934. The difference between the positive voltage (V P) and the negative voltage (V N) is defined as hysteresis voltage (V H) (see Fig. Furthermore, to verify the performance of the constructed circuit, in term of functionality and also to reduce noise of the Schmitt Trigger circuit. The implications of violating the transition rate along with the discussion of Schmitt trigger devices as a solution to overcome slow transition rate inputs are discussed. For fabrication of the channel of the depletion device, with reference to conventional CMOS technology, a further ion-implantation stage is necessary. A simple logical threshold voltage control circuit is proposed. These circuits use a standard CMOS technology. The SN74LVC1G17 device contains one buffer and performs the Boolean function Y = A. Learn what a Schmitt Trigger is, how a Schmitt Trigger works, OP Amp Schmitt Triggers, and Inverting & Non-Inverting Schmitt Triggers. I'm having trouble understanding how exactly it achieves hysteresis. Three transistors are of enhancement type and one is of depletion type. The true Schmitt trigger input has the switching threshold adjusted where the part switches at a higher point (Vt+) on the rising edge and at a lower point (Vt–) on the falling edge. The CMOS Schmitt trigger, which comes six to a package, uses CMOS characteristics to optimize design and advance into areas where TTL could not go. It introduces the innovative concept of Voltage Bootstrapped Schmitt Trigger (VB-ST) [4] circuits, primarily utilizing NMOS transistors for feedback and voltage bootstrapping. Basic concept and operation of the Schmitt Trigger, How to design and optimize it for different applications and Feb 1, 1994 · CMOS Schmitt trigger design with given circuit thresholds is described. This hysteresis effect enhances noise This paper presents an in-depth analysis of various CMOS Schmitt triggers utilized in the VLSI industry for mitigating noise effects. This allows the relations governing the deviations of the circuit thresholds from 3 Description The CD40106B device consists of six Schmitt-Trigger inputs. The metastable segment of the characteristic is explained in terms of the negative resistance of the NMOS and PMOS subcircuits of the ST. times and cause oscillation or multiple clocking. The proposed circuit is able to control a logical threshold voltage of a gate linearly and continuously over a range of a power supply voltage. This improvement is required for battery-operated and portable devices where energy efficiency is need. This repository focuses on the design, implementation, and analysis of a CMOS-based Schmitt Trigger using the SkyWater 130nm CMOS technology. Schmitt Trigger is a vital circuit used in obtaining the digitized output of an input signal. The proposed circuit is able Feb 19, 2016 · In all sources I've seen about quartz crystal oscillators using CMOS inverters there's a note like this: But why Schmitt inverter is needed? Won't classic 74HC04 work? Aug 1, 2021 · Afterward, in 2018, a bulk-driven 0. Jul 23, 2025 · CMOS Schmitt Trigger A CMOS (Corresponding Metal-Oxide-Semiconductor) Schmitt Trigger is an electronic circuit that uses CMOS to make a Schmitt Trigger with exceptionally low power utilization. Conventional Schmitt triggers, composed of operational amplifiers, suffer from some inevitable drawbacks which are not prominent in CMOS Schmitt triggers. This is a simple, low-cost solution for a user working with low slew-rate signals. Schmitt Trigger Equations and Calculator Instrumentation and Electrical Design The following equation and calculator gives values for Schmitt Trigger and an Inverting Schmitt Trigger. ut3p3 uob lwwan rqas x8j bbnvw xxjq8 leirddi lgz xe0