It seems that my original question generated some interest, and I have
received several private replies. A majority of them espouse some
interesting viewpoints that make me question what I thought I knew.
So I am asking this amplifier theory question again.
BIAS is defined as the difference in potential between the cathode and the
control grid.
In a zero signal condition, BIAS current is a result of the difference
described above.
Thus BIAS can be described by the difference in voltage between control grid
and cathode or as an indication of plate current with no signal applied.
Question:
If you increase plate voltage alone, which results in a higher plate current
with no signal applied, are you indeed changing the bias? Yes or no.
Thanks,
Mark
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