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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.

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1answer
16 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 ...
-3
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0answers
17 views

Keil in Visual studio error Type of input file 'C:/Program Files (x86)/Windows Kits/8.1/Include/shared' unknown [duplicate]

Related to my first question via this link, I guessed I need to build my Keil (EMWIN PACK FOR STM32F103RET) project in Visual Studio V2013 and VisualGDB_5.4 package, SO I imported my project to the ...
2
votes
1answer
153 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: ...
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0answers
41 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
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1answer
115 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
29 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
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0answers
26 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
48 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
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1answer
108 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 ...
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0answers
11 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
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1answer
126 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
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2answers
94 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
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1answer
48 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: ...
0
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0answers
50 views

SRAM problem with reading the value I stored, “random” behavior

I've now spent quite a few hours of researching and trying to identify the error, but no luck for me. I'm making a very similar circuit to James Bates RAM video (schematic here: James Bates RAM ...
1
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1answer
44 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
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0answers
30 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
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1answer
94 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
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1answer
61 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
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2answers
45 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
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1answer
132 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
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1answer
43 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
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1answer
52 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
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2answers
97 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
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1answer
104 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
44 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. ...
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0answers
74 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 ...
0
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2answers
159 views

SystemVerilog: Race condition in memory

Hello I'll be brief because my English isn't good thank you for your patience I'm working on a system that drives this memory: ...
0
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3answers
214 views

Altium track width DRC error on corners

I just ran the DRC check in Altium for my PCB and I get errors on trace width for every trace segments on the board. What is the reason for this ? It generated thousands of errors even tho all the ...
0
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0answers
215 views

Altium Comma expected

I am working with an older version of Altium (V09). I have this popup every time I want to move a part in a PCB doc. I have the sch and the pcb open and I changed some parts in the sch and to ...
2
votes
1answer
383 views

Error setting up timer HAL PeriodElapsed Callback STM32F334R8T

I'm trying to create a microsecond delay function using the STMs regular timer. I wanted to set a timer to fire an interrupt every microsecond and then increment a variable in the call back function ...
0
votes
1answer
47 views

Adding to a sum variable produces a “reals can't be synthesized” error in verilog

First, a disclaimer that this is my first time using verilog and I don't really know anything. My code is as follows: ...
0
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0answers
20 views

linearly graded doping profile in Sentaurus

How to define a linearly graded doping profile in Sentaurus? It has options of Gaussian function and error function but how to define a linearly graded profile with a decay rate of 5nm/dec?
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0answers
40 views

Measuring small strain with strain gauge, how nullify errors?

I have a similar circuit like https://www.egr.msu.edu/classes/ece480/capstone/spring15/group05/uploads/4/7/5/1/47515639/ece_480_app_note_justin_bauer.pdf 2. page bottom Wheatstone bridge: 2x 350 ohm ...
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0answers
56 views

Realtek 8711AF : Hardfault error

I have a Relatek ameba RTL8711AF board. I am testing on given Realtek Ameba SDK_without_NDA. I install firmware in proper way. But after I plug Realtek ameba RTL8711AF Board then I got a following ...
0
votes
1answer
70 views

2nd order high pass filter PSPICE error

I'm working on designing a 2nd order sallen key high pass filter in PSPICE for a school project, but in subthreshold with resistors replaced with OTAs (transamp). Schematics shown in figures below. ...
0
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1answer
184 views

Multi driver error in VHDL

Hi I am writing a code for image processing that includes a Ram to/from which data will be written and read. However, I am getting 15 errors like the one below. ...
0
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1answer
105 views

Gain of proportional Controller with distubance \$sin(10t)\$

The diagram below represents the position of ocean oil platform system which use the proportional controller with gain \$k\$. The output \$x(s)\$ is the platform deflection regards the position ...
2
votes
2answers
42 views

Systematic high frequency error in TF measurements

Full disclosure, I've asked a very similar question before which didn't have much success as it was too specific. However I want to try again by restricting the scope of the question. Scenario I'm ...
3
votes
3answers
440 views

getting error from for loops in vhdl

Hi I am trying to use 2 nested for loops in vhdl but I get this error. [Synth 8-561] range expression could not be resolved to a constant [318] I do not understand why this code is not working since ...
0
votes
1answer
404 views

syntax error near if in VHDL

Hi I am trying to write a code in VHDL and I get syntax error near "end" / "if". I am not very good at nested if statements and have not figured out how to close those if statements in what order due ...
0
votes
1answer
247 views

LTSpice arbitrary voltage block (bv) simulating full wave bridge rectifier

I'm creating a LTSpice simulation. I need a voltage source that looks like the output of a full wave bridge rectifier. The simulation includes a sine voltage source (voltage block) line to generate ...
-4
votes
3answers
144 views

Altium designer PCB error

I am having an issue while updating my schematic in Altium PCB. There are two errors as shown in attached image. If anyone can please elaborate on how to solve these issues, I will be highly thankful.....
1
vote
1answer
602 views

Character '0' used but not declared for type std_logic_vector??? (Algorithm state machine)

After adding the counter to my VHDL code am getting the following error: Error (10316): VHDL error at ASM.vhd(31): character ''0'' used but not declared for type "std_logic_vector" Thank you Code: <...
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votes
1answer
217 views

Error: illegal Verilog output port specification

I am having problems with my verilog test bench. Every time I try to run it, I get the error in the title above for my four switch registers. I have searched this question numerous times but I cannot ...
0
votes
1answer
458 views

Error: can't resolve multiple constant driver (VHDL)

trying to solve this error but none of it work. It says Error (10028): Can't resolve multiple constant drivers for net "current_state.S4" at wood_detector.vhd(23) ...
0
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1answer
31 views

Max allowed measurements error

Since it's not possible to know with 100% accuracy about what's going on in a circuit and its components, and I have to trust my multimeter on measurements, what's the usual approach to managing ...
0
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0answers
54 views

PSOC 4 Bootloader will not work when P4[0] and P4[1] Connected to I2C bus

I have been desparately juggling the pin allocations on this project in the hope of freeing up the VREF pin, and thought I had managed to do so. Previously my system was successfully transmitting over ...
9
votes
2answers
878 views

Bad Measuring Equipment?

I was measuring the current through current mirror, when I experienced a problem. But first, I want to mention that I measured this with two ammeters of same manufacturer and same model (Mustool MT826 ...
0
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0answers
239 views

Lab Power Supply - apparent “lost current”

I built the power supply shown on the schematic. It looks like it is "working a treat", but not really. The CV mode is OK, however the CC mode is causing a nightmare. I started the testing with a ...
6
votes
1answer
277 views

DAC to ADC errors

I am testing my setup of MCP4725 DAC connected to MCP3221 ADC. DAC's output is connected to ADC's input. I'm measuring the difference between set values in DAC and measured values in ADC and I'm ...