The MOS Cascode (Cascaded Cathode)

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Presentation transcript:

The MOS Cascode (Cascaded Cathode) CG CS sedr42021_0636a.jpg Figure 6.36 (a) The MOS cascode amplifier. (b) The circuit prepared for small-signal analysis with various input and output resistances indicated. (c) The cascode with the output open-circuited.

Figure 6.37 (a and b) Two equivalent circuits for the output of the cascode amplifier. Either circuit can be used to determine the gain Av = vo/vi, which is equal to Gv because Rin = ¥ and thus vi = vsig.

A Cascode Current Source sedr42021_0643.jpg Figure 6.43 A cascode current-source.

Double Cascoding sedr42021_0644.jpg Figure 6.44 Double cascoding.

The Folded Cascode sedr42021_0645.jpg Figure 6.45 The folded cascode.

Cascode MOS Mirrors sedr42021_0658.jpg Figure 6.58 A cascode MOS current mirror.

The Wilson MOS Mirror sedr42021_0661a.jpg Figure 6.61 The Wilson MOS mirror: (a) circuit; (b) analysis to determine output resistance; and (c) modified circuit.