Amplifier Bandwidth Estimation Techniques
Abstract
It is possible to use SPICE or other circuit simulators to determine the gain and bandwidth of transistor amplifiers, or for that matter any circuit with lumped elements and dependent sources. However, while SPICE is a useful tool for analyzing circuits, it does not give that much insight and intuition into amplifier design. This chapter covers “back-of-the-envelope” techniques for estimating the bandwidth of transistor amplifiers. The techniques in this chapter are employed on bipolar transistor amplifiers, but can also be used for CMOS.
Keywords
Open-circuit time constants; short-circuit time constants; bandwidth estimation; common-emitter amplifier; differential amplifier; case study; ...
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