question about coupling & impedance matching
Hi everyone!!!
I am new to electronics, I got a question as below.
As the attached sch shows, the 128k and 64k input signal was connected with a resistor and capacitor, then a potentiometer. What do they do?
I think they just match the impedance with the IC mc4053.
Thank you very much for your opinions!!!
Hi everyone!!!
I am new to electronics, I got a question as below.
As the attached sch shows, the 128k and 64k input signal was connected with a resistor and capacitor, then a potentiometer. What do they do?
I think they just match the impedance with the IC mc4053.
Thank you very much for your opinions!!!
Attachments
Hi,
some opamps don't like capacitance on their outputs.
A little resistance isolates the capacitance and maintains the phase margin.
Have a look at WJung's site for lots of very detailed and absolutely accurate info on opamps.
www.waltjung.org look at library/ classic for a listing
It might be here.
http://waltjung.org/PDFs/ADI_2002_Seminar_Ch6_Audio_Drivers_I.pdf
some opamps don't like capacitance on their outputs.
A little resistance isolates the capacitance and maintains the phase margin.
Have a look at WJung's site for lots of very detailed and absolutely accurate info on opamps.
www.waltjung.org look at library/ classic for a listing
It might be here.
http://waltjung.org/PDFs/ADI_2002_Seminar_Ch6_Audio_Drivers_I.pdf
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