Compensation circuits for unequal input/output common mode...

Details Compensation circuits for unequal input/output common mode... Compensation circuits for unequal input/output common mode...

2008-05-27

2008-05-27

Chang, Daniel D (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C327S404000

Reexamination Certificate

active

07378875

ABSTRACT:
A circuit apparatus having compensation circuits for unequal input/output common mode voltages is presented. The apparatus includes a circuit unit, a feedback path and a current source. The circuit unit has at least an input terminal for receiving an input signal and at least an output terminal for generating an output signal. The input terminal configured to provide an input common mode voltage and the output terminal configured to provide an output common mode voltage. The feedback path couples the output terminal and the input terminal. The current source is coupled to the input terminal to supply a current. The voltage drop generated at the feedback path compensates the difference between the input common mode voltage and the output common mode voltage.

REFERENCES:
patent: 4500841 (1985-02-01), Morey
patent: 5856758 (1999-01-01), Joffe et al.
patent: 7012458 (2006-03-01), Roo

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