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'[PIC]: OPamp'
2002\06\03@105155 by Tal Bejerano - AMC

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Hi 2 All

I am building a phono to aux preamp based on LM4458. the output is too low
if compared to real phono input.
my question is:

Are the voltage supply to the OPamp effect the output? now I use +-9v
supply.
I cant test it now, cause I built fixed PSU.

Regards

Tal Bejerano
AMC - ISRAEL

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2002\06\03@190302 by Rick C.

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The supply voltage has no bearing on the output voltage swing (gain). It is
determined by the feedback on the op-amp. Changing the feedback resistor(s),
if there is any type of equalization within the feedback will change the
equalization characteristics....but it goes a lot deeper than one can explain
on this list. You should study the theory of op-amps before proceeding with
redesigning the circuit. Try these sites as an example......
http://www.williamson-labs.com/480_opam.htm
www.uoguelph.ca/~antoon/gadgets/741/741.html
Rick

Tal Bejerano - AMC wrote:

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