Questions tagged [distortion]
Distortion is the alteration of the original shape (or other characteristic) of a signal representing an object, image, sound or waveform.
173
questions
6
votes
2
answers
705
views
Distorted square wave
I connected a BK Precision 4017B waveform generator to a Rigol DS1054 Oscilloscope.
BNC ⇽ Co-Axial-Cable ⇾ BNC. 8 MHz square wave generated.
Square wave looks rather distorted to me. See image below.
...
- 181
0
votes
1
answer
77
views
Distortion in a negative channel of the differential amplifier THS4505
I designed a single-ended to differential signal amplifier using a tool provided by Texas Instruments:
The source signal passes through a voltage follower (OPA810IDBVR), so the output resistance ...
- 75
4
votes
2
answers
185
views
How do I calculate THD?
I want to calculate the total harmonic distortion of the signal using this graph and formula.
The formula is taken from this page: Calculating harmonic distortion
First Question: So my problem is to ...
- 147
0
votes
1
answer
53
views
What can cause these CAN signal distortions?
I occasionally observe signal distortions on CAN H, CAN L, and so also the differential signal. It is causing the microcontroller (dsPIC33) to report so-called Invalid Message Receive (IVR) errors. ...
- 1
1
vote
2
answers
144
views
Efficient method of measuring total harmonic distortion
I have been trying to create a set-up for measuring (estimating) the reported total harmonic distortion of an op-amp. (Please don't ask why I don't use a spectrum analyzer because I have been assigned ...
- 338
1
vote
1
answer
95
views
LM393 dual comparator outputs are not the same
I applied the same signals to both inputs of the LM393P double comparator. The number 2 comparator output gave the expected result (first photo).
However, when I apply the same signal to comparator 1,...
- 13
1
vote
0
answers
111
views
My DIY tube amplifier distorts more than I planned
I have built a JTM145 clone. The original amplifier is clean and distorts when the volume is turned up, but my own copy of that amplifier distorts at low volume at the second 12AX7 tube from pin 7 to ...
- 115
2
votes
2
answers
277
views
The input to the gate of an N-channel MOSFET is a pulsed signal but I am getting a ramp signal
I am trying to generate an output voltage of minimum 30V and maximum 50V, current of minimum 10A for a load of 2-10ohms using a MOSFET.
I am connecting an NPN transistor's collector to the gate of the ...
6
votes
3
answers
2k
views
Why am I getting heavy output distortion from a BJT amplifier when driving an 8 ohm load?
Hello electronics professionals and enthusiasts! Software engineer mingling with breadboards and discrete components in his spare time here.
I'm trying to build a simple BJT amplifier for my electric ...
- 71
1
vote
0
answers
91
views
Pspice: FFT and distortion in output file does not coincide
I don't understand how Pspice calculate the distortion factor of a signal. I have this 1kHz output signal from an amplifier, and here is the FFT with 10 montecarlo simulation (zoomed):
In the "...
- 93
0
votes
1
answer
116
views
Why are the phases of a distorted sine wave always these four values?
In this image I show how I distorted a sine wave with three defects in the transfer function, similar to what you might see in a real transistor or tube circuit. I did the FFT on it and the extracted ...
- 11
-1
votes
3
answers
219
views
Why does my spectrum have humps?
In a fun experiment I used an Applicos ATX7006A 18 bit AWG to generate a 1 kHz sine wave and used an Analog Devices AD7671 16 bit ADC to digitize the waveform, then coherently captured the digital ...
- 11
1
vote
1
answer
56
views
Tube preamp overdrive question
Is it possible to add an overdrive gain pot (instead of just simply a bypass switch) to a preamp tube circuit?
I am designing a new amplifier, and I want to include an overdrive/distortion option to ...
- 13
1
vote
1
answer
130
views
Generalized Memory Polynomial in Digital Pre-Distortion
I am currently trying to understand the concept of Generalized Memory Polynomials used in Digital Pre-Distortion and I wanted to seek some answers for some questions that were bothering me. The form
\...
- 33
4
votes
4
answers
239
views
Name and cause for phenomenon in microphone preamp output as seen on scope screen
What might cause 1 kHz sinusoidal signal to change such as seen on the screen? How is this phenomenon possibly called?
I have quite a lot of hand microphones with built-in opamp preamp and electret ...
- 63