Amplifier circuit and control method thereof

Details Amplifier circuit and control method thereof Amplifier circuit and control method thereof

2008-03-18

2008-03-18

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S279000, C330S308000

Reexamination Certificate

active

11181775

ABSTRACT:
An amplifier circuit which is connected to a sensor and variably sets an amplification property and a control method thereof are disclosed, the circuit having the capability of restricting the influence of change with time and temperature change. The amplifier circuit1, which receives, as an input, a detection signal from the sensor and variably sets an amplification property, comprises: (1) a first reference value retaining unit50for retaining a first reference value K1for setting an amplification property which makes an output signal be a specified detection reference output voltage when a reference input condition KJ is detected; (2) a correction signal generation unit30for generating a correction signal HS which reduces the difference between an amplification property actual measurement value and an amplification property set value; and (3) a first amplification property correction unit40for correcting the first reference value K1based on the correction signal HS.

REFERENCES:
patent: 4133008 (1979-01-01), Tisue
patent: 5367268 (1994-11-01), Baba
patent: 6977550 (2005-12-01), Ishida et al.
patent: 06-085940 (1994-03-01), None
patent: 07-192879 (1995-07-01), None

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