Bias generator that automatically adjusts its slew rate

Details Bias generator that automatically adjusts its slew rate Bias generator that automatically adjusts its slew rate

2006-09-05

2006-09-05

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S540000, C327S545000

Reexamination Certificate

active

07102419

ABSTRACT:
A bias generator that automatically adjusts its slew rate is disclosed to generate an output bias current and adjust the output bias current according to the frequency of a clock signal. The slew rate of the amplifier is thus controlled to save power. It includes: a current mirror for receiving a feedback voltage and generating an output bias current; a storage capacitor with a first end and a second end and the latter being coupled to the ground; a charging switch coupled between the output of the current mirror and the first end of the storage capacitor; a discharging switch coupled between the first end of the storage capacitor and the ground; a comparator whose input is coupled to the first end of the storage capacitor and a reference voltage; and a feedback unit coupled to the output of the comparator for outputting a feedback voltage to the current mirror.

REFERENCES:
patent: 5859560 (1999-01-01), Matthews
patent: 6118330 (2000-09-01), Bossard

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