I'd like to put (mono) amp & crossover on the same PCB, and can get 4-layer boards made. Crossover uses +/-12V (regulated); Amp PSU will have a separate bridge for each (25V) rail. My idea is to use one internal layer for 0V (shared by both supplies), and the other for signal Ground. Will this work?
Im planning to make a balanced amp with smd for the entire IPS and VAS. The applied voltage will be in the order of max +/-80V to extreme and most of the cases will be using less than 60V per rail.
Coming to the performance as one of the members specified that the amplifier operates till few MHz and yes I guess they have to be considered and also since the RF contamination these days is quite high so going with 4 layer PCB is not a problem.
The isolation of FR4 is about as said worst case is about 300V per 10mil which is decent enough when you have 4 layer as the applied voltage is not that much.
Noise? well there are many amplifiers which have noise performance acceptable nothing wrong but if something better to be considered then I believe going with even 6 layer so that the top and bottom could be more used as pure shields.
The problem is not with RF frequency that amplifier will amplify but the amplifier will be affected by the noise in the environment. Its my take if anyone has other opinions then would love to hear.
Coming to the performance as one of the members specified that the amplifier operates till few MHz and yes I guess they have to be considered and also since the RF contamination these days is quite high so going with 4 layer PCB is not a problem.
The isolation of FR4 is about as said worst case is about 300V per 10mil which is decent enough when you have 4 layer as the applied voltage is not that much.
Noise? well there are many amplifiers which have noise performance acceptable nothing wrong but if something better to be considered then I believe going with even 6 layer so that the top and bottom could be more used as pure shields.
The problem is not with RF frequency that amplifier will amplify but the amplifier will be affected by the noise in the environment. Its my take if anyone has other opinions then would love to hear.