Reset-free comparator with built-in reference

Details Reset-free comparator with built-in reference Reset-free comparator with built-in reference

2006-07-07

2010-12-14

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S065000, C327S563000

Reexamination Certificate

active

07852123

ABSTRACT:
A comparator circuit includes a bias stage, a first current source, a second current source, and a comparator stage. The bias stage includes a first input, a second input, an output that generates a bias voltage, and a first load, wherein differential reference voltages are applied to the first and second inputs. The first current source generates a bias current based on the bias voltage and inputs the bias current to the bias stage. The second current source generates the bias current based on the bias voltage. The comparator stage communicates with the second current source and includes a first input, a second input, and a second load, wherein differential input voltages are applied to the first and second inputs of the comparator stage. The comparator circuit compares the differential input voltages to the differential reference voltages based on the bias current, the first load, and the second load.

REFERENCES:
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patent: 6686794 (2004-02-01), Abidin et al.
patent: 7102545 (2006-09-01), Choi
patent: 7187214 (2007-03-01), Kim et al.
patent: 2007/0216468 (2007-09-01), Duarte

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