Bias circuit

Details Bias circuit Bias circuit

2006-08-22

2006-08-22

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S540000, C323S316000

Reexamination Certificate

active

07095271

ABSTRACT:
A bias circuit includes a feedback amplifier, a current source, first and second differential transistors, first and second resistive transistors and first and second mirror transistors. The feedback amplifier compares a first reference voltage with a voltage on an internal node and outputs a feedback signal. The current source is controlled by the feedback signal. The first and second differential transistors are connected to the current source. The first and second differential transistors receive a second reference voltage. The second differential transistor has a dimension different from the first differential transistor. The first and second resistive transistors are connected to the first and second differential transistors respectively. The second resistive transistor has a first gate. Each of the first and second mirror transistors has a gate connected to the first gate. The first mirror transistor is connected to the internal node. The second mirror transistor is connected to an output node.

REFERENCES:
patent: 5933051 (1999-08-01), Tsuchida et al.
patent: 6133719 (2000-10-01), Maulik
patent: 6563371 (2003-05-01), Buckley et al.
patent: 6844772 (2005-01-01), Hoon et al.
patent: 2004/0150381 (2004-08-01), Butler

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