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flicker noise is a relatively low frequency effect that "upconverts" to the RF region. So if you can lower the flicker noise of the device itself, you will have less clock jitter. Some sort of audio frequency feedback loop to bias your oscialator transistor, keeping fets outside of their voltage range extremes, applying analog feedback (...)
Using an off-the-shelf audio power amplifier chip is the obvious and best way to go as you get a lot of features in one package. If you have the time and like to experiment, you can look at this design as a start. It appears (according to simulation) to be very stable over a wide frequency range with different load combinations. It looks ok u
Hi guys! Recently I have seen an experiment about audio feedback on vimeo. Here is the seeing this video, I have some question: - Which factors the audio feedback depended on? I can see somethings like: distance and angle between microphone and speaker, their f
The book DAFX - Digital audio Effects by Udo Zölzer has a good chapter about reverberation. Simple reverberation effects can be made by superimposing multiple delays and adding some feedback.
.............. Output impedance of the audio amplifier is 4-8Ω, ..................Not true for sold-state amps. Yes they are designed to drive 4-8Ω loads, but their output impedance is a fraction of an ohm due to feedback. I agree with the recommendation to use two 220V:6V/12V transformers, and driving the
For audio applications, it matters to have a strong signal in the current when it comes to driving a speaker since 10mA at 5V which may be sufficient for a digital IC cannot provide sufficient power to run a speaker. For audio coming from a DAC, first one needs low pass filter. This can be accomplished using stages of butterworth filter with cut
I am facing this problem, which is causing the two push-pull MOSFET to extreme stresses. I am using this to power TAS5630 amp. the boost converter is converting the 12V DC voltage to 36V DC (unregulated). As this is a car amplifier so the battery voltage can be 10V to 14.5V. Everything is ok upto 13.5V DC input. But when the input voltage is
You need at least 3 transistors to make a push-pull amplifier, not just two transistors. The first transistor provides voltage gain and inverts so that negative feedback can be added. You need to learn about transistors to design a simple audio amplifier. Here is a simple transistor amplifier that uses common American transistors, not your orienta
I think you could start from replacing the 741s with better equivalents. IC741 is a very primitive and noisy op-amp. You could probably settle with TL071/TL081 which are commonly used in audio applications.
HI, i need any suggestion of a circuit to put between microphone and power amp , that can eliminate auto oscillation. The audio system is set up in a church built in 1130 and i can't see any other way to eliminate positive feedback due to the acoustic of the interior .
Hello, i want to design circuit that will automatically switch my amplifier on and off according to signal at the input. I'd like it to be quite sensitive even for quiet music across wide frequency spectre. But in some cases where audio cable is too long there is 50Hz (EU) mains hum, it's not very loud, but it's close to treshold of sensitivity tha
It is easy to power the LM358 because it works with a power supply that is from 3V to 32V. You do not need a "virtual ground", instead you bias the (+) input to half the supply voltage with two or three resistors and maybe a filter capacitor. Then the input, output and feedback to ground need coupling capacitors. An LED is a rectifying diode so if
The idea sounds good at first, but it will be problematic. Guitar pickups produce a weak signal. The amplitude is barely sufficient to feed to an ADC. Therefore you still should expect to amplify it in the normal analog manner. After that, you can feed it to a microcontroller. The ADC will turn it into digitized audio. You'll have to store each
The above web doc on page 12 shows how ?bus pumping? is unavoidable with half-bridge class D audio amplifiers. The Gain of a class D amp is proportional to the bus voltage, so therefore bus pumping is not good. Why does anybody ever do a half bridge class D when a full-bridge class D av
Why not use audio port and Audacity free s/w to generate any audio signal.? Any standard shape + noise, or harmonic filtered or .... With spectrum analysis in feedback thru aux in recorded. OP asked to control an arbitrary waveform generator, not generate audio signals; those are two quite different functions.
A lousy old 741 opamp has a noisy output because its design is 47 years old and it was not designed for low noise like some newer audio opamps. Use an OPA134 opamp instead.
Hi all, I am currently working on a phase splitter for my valve audio amplifier. However, I wanted to design the phase splitter stage with transistors instead of traditional valves. The original circuit, which was implemented with vacumm tubes is attached in figure 1. My LTspice attemped is attached in figure 2. The attempted failed, does anyon
Thanks for all the advice, I have no understanding regarding probability theory what so ever which makes this very difficult. I am reading but its a completely new field for me. I tried a solution with arduino IDE and the Due boards as follows uint32_t Noise; void setup() { //setup True Random Number Generator pmc_enable_periph_
i am doing a school project where i need to built a single supply differential audio amplifier using lm1875. i have build the following circuit but sound is very low, i can barely here sound, how can i make it more loud? I am using 12v dc supply 109092
I wish they would say "Ohms" instead of "E". It is 1550 Ohms. But you do not want two of these extremely simple "Multiple feedback Bandpass Filters" in series as the difference subcarrier sidebands filter in a stereo encoder because this simple filter has a peak at about 38kHz with much less level above and below. The filter should have a flat ban