HI
I would like to make a simple HI-FI preamplifier for a CD player with the LM-49720. Do you have a circuit diagram to propose?
I would like to make a simple HI-FI preamplifier for a CD player with the LM-49720. Do you have a circuit diagram to propose?
There is a preamp design in the attached paper. I think there are also gerbers available somewhere if you want to have boards made.
The schematic shows LM4562, but its the same part as LME49720, just marketed in a different product lineup.
The schematic shows LM4562, but its the same part as LME49720, just marketed in a different product lineup.
Weird in that circuit that the servo stage uses TL072 rather than LM4562, seems like a way to destroy the noise and distortion performance for little benefit - isn't the input offset voltage of the TL072 poor compared to the LM4562 anyway, defeating its purpose entirely?
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Servo should be heavily filtered. Usually TL072 can work okay since its just sitting there pretty much at one output voltage. There is better, however.
I find most CD players will drive many power amps as loud as you'd want, so all you need is a pot!