Single pole current mode common-mode feedback circuit

Details Single pole current mode common-mode feedback circuit Single pole current mode common-mode feedback circuit

1997-07-15

1999-08-03

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330252, 330253, H03F 345

Patent

active

059330562

ABSTRACT:
A CMFB circuit that contains only one voltage amplifier in the loop, and is therefore immune to multi-pole stability problems. This is accomplished by providing feedback in the form of current which sums with a constant node current of the differential voltage amplifier. This control current source is created with two transistors, one controlled by the desired, common-mode voltage level, and another connected to the actual, measured common-mode output level.

REFERENCES:
patent: 3786362 (1974-01-01), Marsh et al.
patent: 4720686 (1988-01-01), Westwick

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