[sdiy] More pic digital audio questions

[Fredrik Carlqvist]

I usually take a rail-to-rail op-amp, tie the '+' to a voltage divider with
Vcc/2 and otherwise in a standard inverting amplifier circuit. Often I have
a trimmer to set the gain on the prototype. Get a dual op-amp, because you
will probably need a buffer on the output as well. 

 

Are you using the internal ADC of the PIC? And what kind of output
arrangement will you use?

 

Fredrik C

 

 

 

  _____  

From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of William Berzinskas
Sent: Thursday, November 25, 2004 07:35
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] More pic digital audio questions

 

Hey everybody.. 

 

Happy Turkey Day, Gobble Gobble.. 

anywayz

 

Still toying with the idea of doing some dig audio with a pic..

 

Seems all the ADC's i can use are unipolar.. so i'm guessing i'd need some
kind of preamp-ish device to adjust gain and offset to meet those needs..
anyone got a schematic for this?  is this even right?  

 

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