Gm-C cell with two-stage common mode control and current boost

Details Gm-C cell with two-stage common mode control and current boost Gm-C cell with two-stage common mode control and current boost

1998-08-31

1999-10-05

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327552, 327563, H03B 100

Patent

active

059630841

ABSTRACT:
A gm-C circuit includes a two-stage common mode control loop to limit the common mode voltage during circuit operation. To prevent latch-up in a cross-coupled differential gm-C type filter, the common mode control loop includes a circuit which provides extra current capability to the common-mode control loop without increasing the quiescent, current. This is accomplished by a current boost technique that provides large amounts of current when needed, while running in a low current mode under normal circumstances.

REFERENCES:
patent: 4996498 (1991-02-01), Hanna
patent: 5293514 (1994-03-01), Nakagawara
patent: 5465072 (1995-11-01), Atarodi
patent: 5570049 (1996-10-01), Chen
patent: 5661432 (1997-08-01), Chang et al.
patent: 5666083 (1997-09-01), Myers et al.
patent: 5838199 (1998-11-01), Nakamura

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