Fast settling reference voltage buffer with wide reference...

Details Fast settling reference voltage buffer with wide reference... Fast settling reference voltage buffer with wide reference...

2007-09-12

2009-12-29

Patel, Rajnikant B (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S108000, C326S081000, C365S226000

Reexamination Certificate

active

07639059

ABSTRACT:
A reference voltage buffer circuit (20) includes first and second transistors (M1, M2) and first and second resistors (R1, R2) connected in series between positive and negative power supply voltages and providing a positive reference voltage (Vrp) and a negative reference voltage (Vrn) at the first current handling terminals of the first and second transistors, respectively. A first control voltage (Vg1) for driving the first transistor is generated by a first feedback loop and using a positive boosted voltage. A second control voltage (Vg2) for driving the second transistor is generated by a second feedback loop and using a negative boosted voltage. The first and second feedback loops establish the first and second control voltages while the positive and negative boosted voltages ensure sufficient drives are provided to the first and second transistors. The reference voltage buffer is capable of fast settling while maintaining a wide reference voltage range.

REFERENCES:
patent: 5587676 (1996-12-01), Chowdhury
patent: 5872476 (1999-02-01), Mihara et al.
patent: 6002290 (1999-12-01), Avery et al.
patent: 6384631 (2002-05-01), Wert et al.

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