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DC offset stability and operating point question.
DC offset stability and operating point question.
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Old 21st September 2004, 01:33 PM   #1
nobody special is offline nobody special  United States
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Default DC offset stability and operating point question.

Is it acceptable to use a resistor network in the current sourced front end of an amp to set the DC offset at the output? In other words, the operating point of the output stage is being set by the front end, which is biased with a current source and using trim pots to zero out the offset. Would I see too much drift with this type of setup? BTW, this is with a mosfet p/p class A amp with no global NFB. It's using a VGS multiplier to bias the output stage. What are your thoughts?
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Old 21st September 2004, 03:00 PM   #2
AKSA is offline AKSA  Australia
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Steve,

Works just fine.......

Hugh
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Old 21st September 2004, 03:04 PM   #3
nobody special is offline nobody special  United States
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Cool. Thanks, Hugh!
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