Questions tagged [error]

An error is the unwanted operation of an electrical / electronic component or system resulting from malfunctions. Use this tag if you have something that doesn't work as it should, or doesn't work at all.

Filter by
Sorted by
Tagged with
3
votes
1answer
89 views

ADC issue - possible non-monotonicity?

My ADC (two of them under test - the Analog Devices AD7676, and the Maxim MAX11108) is a 3 Ms/S SAR. The device is powered and referenced by a precision 3.3V reference device (100mA max). The ...
0
votes
1answer
27 views

The error “requires SystemVerilog extensions” while declaring an error

What's wrong with the following code? The array "FIFO" is declared correctly, but an error appears. Can you please help how to fix this? ...
0
votes
1answer
35 views

Connecting a CAN node results in infinite errors on the bus

I'm developing a device which is controlled by the received CAN messages. The device should be eventually mounted in a vehicle. The device receives messages only. It doesn't send any messages on the ...
0
votes
0answers
16 views

Error % for readings of average-sensing multimeters

Question: What is the error % in reading the voltage of a Square wave (1 Vpp) with an average-sensing multimeter with a half-wave rectifier, compared to a TRms multimeter The answer seems to be 11.1% ...
1
vote
2answers
67 views

Voltage divider resistor PN balancing

Refer the representational schematics for voltage sensing by ADC (SAR). I read somewhere to balance the P and N lines add R3 = R1||R2. How come R1 and R2 parallel combination could be considered as ...
1
vote
0answers
45 views

Estimating FFT error

I'm interested in trying to estimate the worst-case error when using a particular DFT implementation (CMSIS) and an ADC and voltage reference with known error bounds. I think that I can work out the ...
0
votes
1answer
43 views

Initializing to MicroSD Card with Arduino produces error code 0x43, 0xff

I am trying to interface with a 32GB MicroSD card with an Arduino Uno, but the code consistently fails at the initialization stage. Below is my schematic (sorry for the horrendous schematic, I'm not ...
0
votes
1answer
30 views

NOT valid mode type SIMetrix from Netlist

I am trying to run PSpice netlist in SIMetrix .cir and it says NOT valid mode type SIMetrix from Netlist, do we have to add any command other than this.
1
vote
2answers
34 views

Error deriving temperature from thermocouple amplifier

I'm using a K-type thermocouple to read the temperature of a 3D printer hot-end. To amplify the thermocouple voltage I am using the Analog Devices AD8495 chip. This chip is mounted on a custom-made ...
0
votes
1answer
171 views

What does a syntax error mean when it says: “near text ”else“; expecting ”end“, or ”(“ ”?

I just don't think the word "near" is specific enough. Am I missing something before or after the word "else"? I'll put the code below and the errors after it. Thanks in advance! ...
1
vote
0answers
65 views

IR Temprature MLX90614 Sensor Diffrent behavior based the I2C Scanner Checking

I need to work with Temperature MLX90614 on Arduino, when i used it's default library code, in bread board sometimes i get correct answer, so i used the soldered circuit for it like this: in this ...
0
votes
0answers
59 views

FTDI Chip Windows Error Message “USB device attached malfunctioned and windows does not recognize.” Design Error?

My PCB has a FT230XS-R USB to UART communicating with an AVR chip. My first prototype board worked perfectly except for the USB problem stated in post title. I triple checked everything. Can NOT find ...
0
votes
0answers
24 views

Derivation of resultant standard deviation from individual standard deviation of an expression

Consider a problem: The total current \$ I=I_1 + I_2 \$ in a circuit is measured as \$ I_1=(150 \pm 1 ) A, I_2=(150 \pm 2 ) A \$ , where the limits of error are given as standard deviations , ...
0
votes
1answer
132 views

Removing modelsim error

I am trying to simulate a simple inverter in verilog using modelsim 10.7 version. While compiling the code I am getting the -novopt error (error code 12110). As per user manual page 80; the -novopt ...
3
votes
2answers
250 views

How to solve Keil compiler 'Error: L6218E: Undefined symbol' on STM32

I am trying to run a simple tutorial (external interrupt example) on my NUCLEO-F746ZG board. I use STM32CubeMx software version 5.2.0 and Keil software version 5.28.0.0 as compiler. I get the ...
0
votes
1answer
48 views

How can line code polarity inversion happen?

One of the disadvantages of some line codes like NRZ-L or RZ is that if a sudden change in polarity occurs, then all received bits will be erroneous (flipped). How can such a sudden change in ...
1
vote
0answers
55 views

What causes long-term RTD reading drifts?

I am working with a controller that was designed to read multiple types of inputs including 3 wire RTD signals. In some cases, we have observed the controller suddenly spike up +15 degrees and ...
0
votes
1answer
69 views

PCB design rule errors, but can't understand why

I am trying to create a PCB using NI Ultiboard. My circuit is a SECPIC DC-DC converter and controlling the L1 current. This is my circuit: and I get this error: ...
0
votes
0answers
60 views

VHDL - Unable to correctly implement complex scheduling of data lines to Inputs of multiplexers

In my design, I have two configurable parameters ...
0
votes
1answer
38 views

Solve setup time violation when CLK is same as data input in shift resistor

DSTM7 is same as push button 1 and DSTM8 is same as push button 0. I want shift resister shift when either button is pushed. For example, when push button 1 is pushed and DSTM7 has a pulse and shift ...
0
votes
1answer
53 views

General expression for non-unity gain feedback system's steady state error with disturbance

Thanks in advance for having a look. I finally have some time on my hands to go back through my controls systems text and I want to understand how the general expression is derived; rather than just ...
5
votes
2answers
361 views

Why have apparent memory bitflips in non-ECC memory not increased?

Back in the early 2000s I remember asking about why it was so important that servers use ECC memory. The prevailing wisdom at the time was that systems with lots of RAM would be, statistically, more ...
-3
votes
4answers
152 views

Why won't this circuit work?

I made this circuit. I calculated everything, but all I get is THE LED JUST WONT TURN ON. simulate this circuit – Schematic created using CircuitLab
0
votes
1answer
72 views

INTERNAL_ERROR:Xst:hdltool.c:4862:1.209 - Signal lookup_b.address, 0 ones:XX

I'm getting the above error message, and I don't understand what I'm doing wrong. I've only found one reference to that message, and it led me down this rabbit hole of trying to apply the ...
0
votes
1answer
91 views

Why does this file give syntax error in verilog?

My original file has the following ...
0
votes
0answers
186 views

ETAP: Error when connecting single phase load to three phase bus

This is a long shot, but hopefully someone who works with ETAP can help me out. Im trying to connect a single phase load to a three phase bus, and Im having this error: Error 1655-01: The load has a ...
1
vote
1answer
18 views

Need some help in bit error rate calculation for QPSK when using Gray coding

Why is Probability of Bit Error = 2 times the Probability of Symbol Error in QPSK with Gray Coding. Is it because one bit error has the potential to cause two symbol errors (2 symbols where they ...
2
votes
1answer
590 views

PSPICE - must be 'I' or 'V' error

I'm trying to make a super simple circuit simulation for a class, and I keep getting the same error: ERROR -- Must be 'I' or 'V' Here's the whole log: ...
0
votes
0answers
179 views

Detecting both short and open circuit voice coils in coil driver

I'm building a voice coil driver for a science experiment. The coils are in an environment where both coil shorts and coil open circuits are common problems. I'd like to build in a fault indicator to ...
4
votes
1answer
242 views

What is the typical RMS noise of a lithium battery?

Take a typical CR2032 battery, if it is not discharging, what is the typical variation in voltage over a short period of time (eg a few seconds or minutes)?
2
votes
1answer
76 views

Error Amplifier Gain

I was studying the "SG3525" IC and its functions, and I encountered this issue: In the "Error Amplifier" section of the Datasheet, there is a parameter that named "DC trans-conductance" which it is "...
0
votes
0answers
80 views

Error: L6218E: Undefined symbol LCD_X_Config in Keil

I encountered a problem working with the EMWIN package in keil, this error message: ...
2
votes
1answer
50 views

J-Link programmer in Windows 8 don't work

I use the J-Link programmer in Windows 8. A few days ago, my programmer hanged and the LEDs stayed silent, and I, with the help of the Internet, was again using the SAM-BA software to install the ...
1
vote
1answer
582 views

PICkit 2 VPP voltage level error. Check target & retry operation. Error in PICkit 2

We are using PICkit 2 (STL035V2.0 See here ) to program a PIC 16F676. We got the error : PICkit 2 VPP voltage level error. Check target & retry operation. Error in PICkit 2. We also ...
0
votes
0answers
72 views

Steady State Error to Ramp Input Using Derivative of Complementary Sensitivity

I know that to find the steady state error to a ramp input, we can use the final value theorem. However, I was reading up on the Internal Model Control and the article uses a different form of steady ...
2
votes
1answer
903 views

The CAN bus in this vehicle has only one 120 ohm termination resistance. What problems would this provoke?

This vehicle that I've started co-developing is designed with only a 120 termination resistor on the CAN bus. Obviously there should be two of those resistors on two ends of the bus. I will be making ...
1
vote
2answers
187 views

SD card initialisation problem with Atmega32u4

I have had this issue for the last couple of days and I cannot solve it. There are many similar issues I've read through online but they have not really worked for me. This project involves a PCB and ...
0
votes
1answer
63 views

Compiler error when using HAL functions for I2C communication

I am using the board STM32F3 and I am trying to establish I2C communication between the microcontroller and the accelerometer LSM303DLHC by using the HAL functions. This is the code: ...
1
vote
1answer
46 views

DC Gain too low at higher voltages

I am having an issue with DC gain for a non-inverting op amp circuit. All I am trying to do is double the voltage from two DAC outputs (DAC range is 0 to 5V and I want it to be ~0V to 10V). The DAC ...
0
votes
0answers
143 views

Steady state error due to disturbance

I was trying to solve a question from the 2004 GATE IN paper, I solved it this way, Now, the book is giving a different solution, I'm pretty sure my way is correct since they pulled the "standard ...
-2
votes
1answer
434 views

lt Spice simulation duplication error

I am new to using LT Spice. I have imported an operational amplifier. When I try to run a simulations response I received an error (shown in the screenshot.) It says Netlist Error: Duplicated ...
1
vote
1answer
69 views

PSPICE graphs work separately for subcircuits, wrong when combined?

I'm working on a pulse generation circuit that will be used to drive an ultrasonic transducer. The following circuit is giving an unexpected output. It might look complicated, but really it can be ...
0
votes
2answers
47 views

AT90CAN128 Random Malfunctions

I've got the following Situation. An AT90CAN128 connected to a LCD,multiple Buttons, Sensors,LED's and engines. Shown on the LCD are the Sensor Values and a Menu you can go through with a rotary ...
0
votes
1answer
376 views

Error (10028): Can't resolve multiple constant drivers for net “rf[7][XX]” at registerfile8x32.v

Hello Im making a register file 8x32 in verilog, the sim looks good but when I compile on quartus it makes Error (10028): Can't resolve multiple constant drivers for net "rf[7][31]" at ...
0
votes
1answer
62 views

R&S Spectrum Analyzer Voltage Measurement Error

I just got FPC1000 spectrum analyzer that goes from 5 kHz to 1 GHz. I didn't had any spectrum analyzer experiences before this one so everything is very new to me. Among few things that I don't ...
1
vote
1answer
79 views

Accidentally Pasted Beyond Origin in Altium

I'm new in Altium and I accidentally pasted some pads and components(the ones at the bottom corner) from another pcb file but I wasn't aware of it at first because it didn't show on the sheet on the ...
0
votes
2answers
282 views

Cleaning up GND/PWR-plane air wire errors in EAGLE + bonus questions

So I've just finished up my first complete PCB board. The layout is 4-layer based, set up as ((1*2)*(15*16)) ---not sure if it should be ((1+2)*(15+16)) or ((1*2)+(15*16)) instead, please advise--- ...
0
votes
1answer
283 views

What is RSS Error?

I was reading through documentation for an INA219 sensor from TI (http://www.ti.com/product/INA219), and they have a chart for RSS Error. What does RSS stand for?
2
votes
2answers
45 views

Random Error Waiting Time

Suppose that you have a design that has had an error after running 14, 18, and 20 hours. You're not exactly sure what is causing the error, but you make a change to the design that MIGHT fix it. ...
0
votes
0answers
103 views

Impedance magnitude and phase error - Mathematical formula

Today I read a paper on which there are the terms magnitude error and phase error relative to a comparison between measurements performed with a biosensor and with a benchtop electrochemical impedance ...