Distortion is the alteration of the original shape (or other characteristic) of a signal representing an object, image, sound or waveform.

learn more… | top users | synonyms

1
vote
1answer
60 views

Unwanted oscillations and distortions in buck converter

I've tried today to design a very simple and crude 26V to ~12V buck converter. But after testing it in LTspice I've got some weird and unexplained oscillations and distortions. The oscillations ...
0
votes
2answers
62 views

Distortion in TDA2030 circuit

I looked at a friend's guitar amplifier which wasn't working, the problem was clearly (because it fell off) a broken IC (TDA2030AC). After replacing it, the amplifier started working again but when I ...
0
votes
1answer
46 views

Is it possible to make a 150 Hz resonant circuit from RF toroids?

I want to make an LC filter resonant at 150 Hz using a 2.5 uF 400 V CBB61 capacitor and inductor. They are shown in the image below. The toroid core looks like an RF toroid core but I don't know the ...
8
votes
2answers
811 views

Parallel speakers sound bad, but serials are fine

I have made a simple speaker circuit. It sounds (at least to me) surprisingly good (though an audiophile would probably scream out loud and run away). I have currently run across a problem. To ...
1
vote
3answers
229 views

How to decrease distortion/noise of LM386 amplifier at max gain and volume?

From my previous question, I've made LM386 amplifier and it works better than LM1458 amplifier. I've added gain and bass boost in my LM386 amplifier. How to decrease distortion/noise of LM386 ...
1
vote
1answer
129 views

What could be the source of this sine wave distortion, visible as equally spaced lines in FFT?

I have an MCU controlling a 16bit DAC via SPI (and an additional LDAC output, which triggers the update of the DAC output). The MCU has a precalculated 1120Hz sine wave in a 364-byte long buffer (all ...
0
votes
1answer
63 views

What is causing this distortion on a 20MHz control signal?

I'm having an issue with a PCB on which I have a microcontroller and an external SRAM. I don't want to fully describe the problem as I already posted a question regarding that. Link Since that I ...
2
votes
2answers
216 views

MP1584 DC/DC step down converter cause whine in audio, how to avoid?

Short story I use the MP1584 to step down 5VDC to 1.5VDC to power an audio equalizer taken from a Panasonic walkman (RQ-P255) from the nineties. However this is working great, sound is great, it ...
2
votes
3answers
298 views

DC blocking capacitor in opamp feedback loop - does this count as the “signal path”?

I'm a bit new to electronics, so this may be a dumb question, though I hope not. I'm working on a pre-amp circuit which can drive several TDA7492 boards from a single source (I've found they don't ...
0
votes
1answer
114 views

Connecting op amp circuit output to ADC makes signal asymetric

I'm connecting an electric guitar to amplifier circuit and the output of the circuit to ADC. I've checked the output of amplifier with the osciloscope. The signal seemed fine, but after connecting it ...
0
votes
1answer
67 views

Noises generated by OpAmp driving 50 ohm load

I am trying to drive a 50 ohm with 300mV, 15khz sine wave using an OpAmp. The chip I am using is ADA4610. However, I found that there are noises of 15kHz(4mV Vpp) and 30kHz(3mV Vpp) at the power ...
0
votes
1answer
44 views

Distortion circuit analysis

Here is the schematic: I know that this circuit's purpose is to add distortion to a an electric guitar signal.The main components that add distortion(as far as a I believe) are the transistor(a ...
1
vote
0answers
83 views

why my DAQ signal is a noisy signal?

background: My goal is to use an Arduino with two proximity probe (sensors) to achieve some output. It is worth mentioning that the output of the proximity probe has two components: DC output that ...
0
votes
1answer
101 views

What is the harmonic content of a PWM signal?

Suppose I'm using a 3.6 kHz carrier to reproduce a 60 Hz sine wave. To properly design a filter for this application to hit a specific harmonic distortion target, I need to know the harmonic content ...
0
votes
1answer
55 views

Amplitude modulation transmission distortion

I need to clarify a question. Let's say that in a wire I carry a current modulated in time so that it is an amplitude modulation of a sinusoidal carrier with a modulating sinusoidal wave. In frequency ...
3
votes
3answers
309 views

Vacuum tube distortion mechanism

What is the mechanism by which Triodes in audio tube amps generate harmonic distortion? It is my understanding that the distortion is generated by means of electron bunching. That is, when the grid ...
7
votes
4answers
3k views

How do diodes and capacitors reduce Crossover distortion?

I found this diagram about Class AB Amplifiers and the reduction of crossover distortion: http://www.electronics-tutorials.ws/amplifier/amp_7.html This pre-biasing voltage either for a ...
4
votes
1answer
502 views

What is Transient Intermodulation Distortion?

I've looked at Op-amp slew rate over frequency How it is possible to make bad audio amp? Which op-amp for audio? as well as several papers about the topic but although I may get the basis of what ...
1
vote
1answer
67 views

Would T feedback network of transimpedance cause serious distortion?

I am now designing a transimpedance using ADA4062-2 to detect signal from a photodiode. The first image is the equivalent circuit. The signal from PD contains 1kHz sine wave and 2kHz sine wave and ...
0
votes
1answer
138 views

How can I increase the overall gain on this circuit?

This is a circuit from Nicholus Boscorelli's Stompbox Cookbook, page 194. The circuit introduces crossover distortion. i built it and it works fine. However it won't go past unity gain which wouldn't ...
0
votes
1answer
87 views

Cross-over distortion thanks to short circuit protection

I am trying to build a AB Amplifier for school with some darlington transistors. Everything seemed to go fine until I added the short circuit protection. From that moment a cross-over distortion ...
1
vote
0answers
361 views

How to make pulse wave from sine wave - audio frequency

I'm looking for a quick-and-dirty way of converting something close to a sine wave to a narrow pulse wave. Please see the image: a low bass note played through a broken transformer. I'm trying to ...
0
votes
1answer
51 views

Harmonic distortion and Nyquist rate (Spurs above the Nyquist rate of a DAC)

I have been reading an article during the past few days for a project I am doing and I've come across a point that bugs me out. It is about improving the spurious free dynamic range (SFDR) of DACs. ...
3
votes
2answers
593 views

Replacing a FET to avoid the body diode (audio switching)

Here is a circuit I've found online for switching a guitar signal, it uses a mechanical relay in order to rout the signal through a sound processing unit or around it, bypassing the circuit. ...
0
votes
1answer
422 views

SMD capacitors for a guitar distortion pedal

I'm trying to build a guitar distortion pedal. Alright, a bit about the motivation behind this project : It's my friend's birthday in a couple of days and I wanted to get him a distortion pedal cause ...
1
vote
2answers
407 views

Extremely noisy signal after voltage follower/buffer [closed]

I am trying to create a voltage follower for my CCD linear array. When I measure the signal with oscilloscope directly from the CCD outptut - the signal is reasonably clean. However, when I measure if ...
2
votes
3answers
1k views

Connecting ADC pin to op. amp. output distorts signal

I am using a STM32 Cortex M3 microcontroller and have configured the ADC. I have verified that the ADC works by measuring different voltages on the micro controller eval. board. When I connect my ADC ...
2
votes
1answer
640 views

Distortion in the output of amplifier circuit using uA741 + schematics and graphs

I'm simulating an audio amplifier with uA741 in pspice (student version). The input signal is a 0.1v (100mv) sine wave with frequency between 1kHz and 10kHz. The theoretical gain is 33 but in ...
2
votes
1answer
559 views

What type of potentiometer to use?

I'm making a Metal distortion pedal ill be using 6 potentiometers POT1 Distortion 250K POT2 low freq control 100K POT3 high freq control 100K POT4 mid 100K ...
1
vote
2answers
206 views

Total Harmonic Distortion

If a specific project specification says "...amplifier must be linear such that the harmonic distortions are maintained below -40dB...", does that mean that a THD of -30dB would meet the requirements ...
6
votes
3answers
660 views

What effect does bit depth of an ADC have on noise floor, THD, or any other specification?

I was told recently that there is a direct relationship between bit depth of a measurement adc and minimum measurable noise floor, which in turn affects accuracy of THD measurements of DUT. I'm afraid ...
2
votes
2answers
166 views

what is this distortion?

what is this distortion? This is the circuit where it is derived As you can see, it looks like there is a problem in the negative half cycle, its not really a straight clip. The waveform is ...
2
votes
2answers
637 views

Humming and Transmission issues

First of all, I am going through designing all of this because I did not find a ready made circuitry for my purpose which is mentioned later. If you know a circuitry that is well tested and does what ...
3
votes
1answer
704 views

What's the relationship between harmonic distortion and intermodulation distortion?

So if you take a sine wave and put it through a non-linear transfer function, it experiences harmonic distortion, which produces other sine wave components at integer multiples of the original. If ...