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19th March 2005, 09:07 PM
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diyAudio Member
Join Date: Mar 2005
Location: Edmonton
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Need help with my Differential Amp
I'm trying to build a differential gain amplifier with a gain from 1-20 that works over a bandwidth of 0-15kHz using 4 discrete BJTs. I'm unsure where to put my variable resistor (which varies the gain) so that it can be seen by both inputs of the diff amp. Any help I could get on my design would be great. Thanks.
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