dodcomp 电路图.pdf

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1、+ + + + - + - + - + - +9V 22k 500k 0.05uf VTL5C2 0.01uf10k 470k 10uf 100k 0.05 uf 0.05 uf 47 uf Q1, Q2 = NP4124 Op amps are LM358 220k220k 4.7k IN OUT DOD Compressor 280A +9V +9V 3M 22k 22k 0.05 uf 100k This is the original schematic, but it looks funny to me. I think that there should be a 100k res

2、istor at the (-) input of the second opamp to make it a pure inverter. As it is, that stage would have a very large +9V +9V 3M 22k 22k 0.05 uf 100k 100k voltage gain, unbalancing what I think works as a full wave rectifier/current source for the LED in the compression feedback loop. I would expect that the proper circuit is as shown in the fragment below. I think the VTL5C2 LED/LDR module could be replaced with a CLM6000 if you could find one of those. Bypass RadioFans.CN 收音机爱 好者资料库