Compensation mechanism for compensating bias levels of an...

Details Compensation mechanism for compensating bias levels of an... Compensation mechanism for compensating bias levels of an...

2005-09-13

2005-09-13

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S538000, C327S539000, C327S545000

Reexamination Certificate

active

06943618

ABSTRACT:
A compensation circuit is disclosed for compensating bias levels of an operational circuit in response to variations in a supply voltage. The compensation mechanism identifies variations in the supply voltage by comparing the voltage of a selected node of the operation circuit with a relatively constant or fixed reference voltage. Based on the results of the comparison, the compensation mechanism adjusts selected bias levels in the operational circuit, preferably using current stealing circuitry, so that the functionality and performance of the operational circuit can be substantially maintained. A biasing circuit for biasing one or more differential pairs is also disclosed.

REFERENCES:
patent: 4744018 (1988-05-01), Eccleston
patent: 5047657 (1991-09-01), Seevinck et al.
patent: 5103158 (1992-04-01), Cho et al.
patent: 5359552 (1994-10-01), Dhong et al.
patent: 5933051 (1999-08-01), Tsuchida et al.

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