Offset control circuit

Details Offset control circuit Offset control circuit

2005-04-19

2005-04-19

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C330S009000

Reexamination Certificate

active

06882207

ABSTRACT:
In an offset control circuit, a voltage/current converting portion generates differential current (I+ and I−) that are proportional to a potential difference between differential input voltage signals (VIN+ and VIN−), and an offset adjusting current-generating portion generates offset adjusting currents (Iofs+ and Iofs−). In a current/voltage converting portion, a current (Ir) that is proportional to a potential difference between differential terminals flows through. Differential current output terminals, offset adjusting current-output terminals and the differential terminals are connected. The offset components contained in the differential input voltage signals (VIN+ and VIN−) are adjusted with the offset adjusting currents (Iofs+ and Iofs−), and differential output voltage signals (VO+ and VO−) in which the offset components are added to the differential input voltage signals (VIN+ and VIN−) are generated.

REFERENCES:
patent: 5365191 (1994-11-01), Hayashi
patent: 5736885 (1998-04-01), Wietecha et al.
patent: 7-38345 (1995-02-01), None

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