Method and apparatus for locally regulated circuit

Details Method and apparatus for locally regulated circuit Method and apparatus for locally regulated circuit

2006-03-28

2006-03-28

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S436000, C327S543000

Reexamination Certificate

active

07019562

ABSTRACT:
According to one embodiment, a locally regulated circuit regulates current flows (IREGand IRG) through the operation of a current mirror (334, 332, 326). The regulated current flows are used to self-generate a common mode voltage (V422) at node (322) and to produce the required bias signals through input stage (302and308) and output stage (314and316) in response to data input signals (D and D-complement). Cancellation of common mode voltage variation is further enhanced by generating a supplemental current in response to an error signal generated by comparing a desired common mode voltage (VCM) to the actual common mode voltage at node (322). The supplemental current conducted by either of loads (310and312) serves to regulate the common mode voltage at node (322).

REFERENCES:
patent: 6191994 (2001-02-01), Ooishi
patent: 6292031 (2001-09-01), Thompson et al.
patent: 6774722 (2004-08-01), Hogervorst
patent: 6819165 (2004-11-01), Ho et al.

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