Bias Circuit

Unit 6. Coupling and Bypass Capacitors
and Frequency Response
As noted in Unit 1, due to the external capacitors that are attached to the circuit for
configuring the signal circuit, the gain of the amplifiers will tend to fall off at the low-frequency
end of the frequency spectrum. The design basis for choosing the capacitors for a given
application is considered in the following. The gain-frequency dependence due to the input
coupling capacitor, the source-resistor bypass capacitor, and the load coupling capacitor is
discussed. A discussion of response roll-off on the high end of the spectrum is deferred to Unit
11.