There is a problem with the graphics output of the TDA2030 typical circuit. . .

jkairup

There is a problem with the graphics output of the TDA2030 typical circuit. . . [Copy link]

 

I recently used the typical 2030 circuit on the Internet to connect an audio amplifier. There was no problem in the software simulation, but the waveform observed by the oscilloscope was wrong.

As shown below, I hope you guys can help me see how to solve it?

maychang

It's a pretty good dual-channel oscilloscope, why not use two channels to view the input and output waveforms simultaneously?

jkairup

maychang posted on 2021-6-23 16:42 It's a good dual-channel oscilloscope. Why don't you use two channels to view the input and output waveforms at the same time?

Load R7 is single-ended to ground, so only one channel is used.

maychang

jkairup posted on 2021-6-23 17:30 Load R7 is single-ended to ground, so only a single channel is used

"Load R7 is single-ended to ground, so only a single channel is used."

The input signal is also single-ended to ground.

jkairup

maychang posted on 2021-6-23 18:13 "Load R7 is single-ended to ground, so only a single channel is used." The input signal is also single-ended to ground.

Yes, single-ended to ground

fengzenghao

Is the power supply clean?

Gen_X

The input frequency is just at the point where the phase shift is maximum, causing a ringing effect.

Your bandpass parameters are calculated or look at others! C3R3, C2R4

minihang

Top it

miaods2002

Consider adding a 100nF capacitor from the VCC power supply terminal to the ground, as close as possible to the ⑤ pin of TDA2030.

miaods2002

Quoting “(*) Closed loop gain must be higher than 24dB”, the data sheet requires closed loop gain >= 24dB. Your circuit gain is too small.

miaods2002

Data Sheet

se7ens

Add a filter capacitor to the power supply of the op amp