what is positive feedback and negative feedback?
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Answer Posted / mister smarty pants
Positive feedback is typically part of an an amplifier
circuit where some (or all) of the output of the amplifier
is returned to the input in-phase with the incoming signal.
If enough signal is fed back, it typically causes
oscillation. Positive feedback can occur by virtue of the
inter-component capacitance as a result of poor circuit
design.
Negative feeback is similar except the signal fed back is
in the opposite phase of the original signal coming into
the amplifier. If the amount of negative feedback is
correct, it will typically cancell out any positive
feedback and stabilize an amplifier by preventing
oscillation. This is sometimes also called "neutralizing"
an amplifier.
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