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Chip Amps Amplifiers based on integrated circuits

Lower chipamp distortion through PCB routing
Lower chipamp distortion through PCB routing
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Old 7th August 2018, 09:50 PM   #51
alexcp is offline alexcp  United States
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Lower chipamp distortion through PCB routing
Thank you all for the recommended reading.

So far, I read the TI app note recommended by KSTR in post #46 above. I found it very compact and accessible.

As an exercise, I designed, simulated, and built a composite amp with a gain of 21 with two halves of an TL082 - see attachments. As predicted, it oscillated without compensation, and properly compensated, it demonstrated very different distortion behavior compared to a single half of the TL082. The measurements below were taken at approx 8Vrms output level, just below clipping.
Attached Images
File Type: png TL082 composite sch.png (5.7 KB, 89 views)
File Type: png TL082 composite uncomp.png (28.6 KB, 86 views)
File Type: png TL082 composite comp.png (23.2 KB, 87 views)
File Type: png TL082 composite 1kHz.png (49.9 KB, 88 views)
File Type: png TL082 composite 19+20kHz.png (50.7 KB, 88 views)
File Type: png TL082 single 1kHz.png (37.7 KB, 29 views)
File Type: png TL082 single 19+20kHz.png (50.0 KB, 28 views)

Last edited by alexcp; 7th August 2018 at 09:53 PM.
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Old 24th August 2018, 04:32 PM   #52
miklos is offline miklos  Hungary
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Hi Alex,
I got my boards, they're nice
Thanks, Miklos
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