December 2017
Intermediate to advanced
926 pages
22h 26m
English

FIGURE 5.26(a) Circuit diagram and (b) small-signal equivalent model of a cascode amplifier.
An amplifier with a cascode configuration has the advantage of exhibiting a higher bandwidth due its improved isolation between the input and output nodes. Figure 5.26(a) shows the circuit diagram of a cascode amplifier, whose input stage is a common-source transistor driving a common-gate transistor loaded by a resistor. By replacing each transistor with its equivalent model, the small-signal circuit shown in Figure 5.26(b) can be derived. It is assumed that and . Using Kirchhoff’s current law for the ...
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