[sdiy] electrolytic coupling capacitors

[Samuel Morse]

I think equal voltages on either side of the coupling capacitor should be
fine. A well designed IC should have good input and output isolation so you
shouldn't have to worry about those circuits.

-Sam

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Peter Blackett
Sent: Sunday, October 31, 2004 3:11 PM
To: synth diy list
Subject: Re: [sdiy] electrolytic coupling capacitors


Dear List ,
just a quick question with regard to coupling caps.
what do you do when the voltage on either side of the caps is roughly
the same ?
is it beter to arrange for there to be a small amount of offset on the
output on the op amp side of the coupling cap, or not. ?
it is well worth having coupling caps on the inputs of amps/mixers.
as you never know what circuits might put dc on the input !
regards Peter

     Theo wrote:
> Look at the level of the "internal" reference voltage and assume the
> "outside" reference voltage to be 0V.
> Now mount the caps so that they are polarized correctly based on the
> reference voltages.
> BTW Usually this means the positive side looks at the circuit.
>
> HTH
> Theo
>