Television – Image signal processing circuitry specific to television – Amplifiers
Reexamination Certificate
2006-05-23
2006-05-23
Hsia, Sherrie (Department: 2614)
Television
Image signal processing circuitry specific to television
Amplifiers
C348S689000, C348S572000, C348S678000
Reexamination Certificate
active
07050116
ABSTRACT:
An input stage for a video receiver includes a variable gain amplifier, an analog-to-digital converter for sampling a video signal and a digital processing unit for processing digital samples of the video signal. An analog regulating circuit sets an input potential at an input of the variable gain amplifier. A differential architecture is used for the variable gain amplifier and the digital analog converter. A conversion circuit between an input coupling capacitor and the variable gain amplifier allows generating the video signal on two channels in antiphase, which are centered on the common mode voltage. Such differential architecture allows reducing the amplitude of analog signals, which is particularly advantageous in the case of a low voltage supply delivering a few volts. In addition, linearity of the video signal processing is enhanced.
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French Preliminary Search Report dated Aug. 20, 2002 for French Application No. 01 14921.
Ribas Raymond
Sabut Marc
Van Zanten Francois
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Gibbons Jon A.
Hsia Sherrie
Jorgenson Kisa K.
STMicroelectronics S.A.
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