Pole/zero compensation in cascode amplifiers

Details Pole/zero compensation in cascode amplifiers Pole/zero compensation in cascode amplifiers

1993-11-01

1995-04-11

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330292, H03F 345

Patent

active

054062209

ABSTRACT:
Compensation for a second pole located at an internal node (107 and 108) of a two pole cascode differential amplifier (30) is accomplished by introducing a left half plane zero in the transfer function of the cascode differential amplifier (30). This is done by coupling a compensation capacitor (46, 47) between an output node (105, 106) and the internal node (107, 108) of the cascode differential amplifier (30). The compensation capacitors (46, 47) improve high frequency performance of the amplifier (30) by improving phase margin and increasing stability.

REFERENCES:
patent: 4484148 (1984-11-01), Wieser et al.
patent: 4736117 (1988-04-01), Wieser
patent: 4737732 (1988-04-01), Westwick
patent: 5089789 (1992-02-01), Van Tran
patent: 5101126 (1992-03-01), Butler et al.
patent: 5136258 (1992-08-01), Nicollini et al.
patent: 5142240 (1992-08-01), Isota et al.
patent: 5202645 (1993-04-01), Phan et al.
patent: 5212455 (1993-05-01), Pernici et al.
Vadipour, "A New Compensation Technique for Resistive Level Shifters", IEEE Journal of Solid-State Circuits, vol. 28, No. 1, Jan. 1993, pp. 93-95.

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