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.