Amplifiers – With d.c. reinsertion circuit
Patent
1997-11-12
1999-12-07
Pascal, Robert
Amplifiers
With d.c. reinsertion circuit
348707, H03F 2100, H03K 302
Patent
active
059990457
ABSTRACT:
An amplification circuit comprising a device for compensating for its input current. The amplification circuit includes an amplifier and a capacitor located on the input side of the amplifier. The input-current compensation device consists of a current generator, generating a current Ig, a switch and a device for measuring the average current charging or discharging the capacitor during the time that the switch is open. The current Ig is such that: Average current=Ia-Ig, where Ia is the input current of the amplifier. The value of the average current is close to zero. The value of the current Ig which the current generator must output, so as to make the average current close to zero, is calculated using the device for measuring the average current. The invention particularly applies to a circuit for restoring the DC component of a video signal.
REFERENCES:
patent: 3207998 (1965-09-01), Corney et al.
patent: 3551596 (1970-12-01), Borenstein
patent: 3609230 (1971-09-01), Paine
patent: 3811053 (1974-05-01), Habib
patent: 4242640 (1980-12-01), Bean
patent: 4296437 (1981-10-01), Geurts
patent: 4544951 (1985-10-01), Yoshisato
patent: 4644198 (1987-02-01), Ahmed
4644198 (Ahmed) "Signal Clamp" Feb. 17, 1987 JP 61109376 May 27, 1986.
Claverie Claude
Hardy Patrick
Hergault Stephane
Emanuel Peter M.
Kiel Paul P.
Nguyen Khanh Van
Pascal Robert
Thomson Broadcast Systems
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