Differential comparator with a replica input stage to set...

Details Differential comparator with a replica input stage to set... Differential comparator with a replica input stage to set...

2008-05-20

2008-05-20

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S066000, C327S067000, C327S069000, C327S074000, C327S082000, C327S563000, C327S359000

Reexamination Certificate

active

11176998

ABSTRACT:
Methods and apparatus for properly biasing differential comparators are provided. Using a feedback relationship, a bias for a main stage that receives a first differential input of the comparator is produced. Separately, a feedback relationship produces a bias for a main stage that receives a second differential input. These biases, produced as a result of the feedback relationship between bias stages and stages that replicate the main stages, are applied to the main stages. The outputs of the differential comparator are differential outputs with improved common-mode rejection as a result of the feedback and replica biasing.

REFERENCES:
patent: 4162454 (1979-07-01), Olsen
patent: 7064595 (2006-06-01), Sharma et al.
Sedra and Smith, “Microelectronic Circuits.” 2004. Oxford University Press. Fifth Edition. p. 728.

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