Analog front end device

Details Analog front end device Analog front end device

2007-09-24

2009-06-09

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S155000

Reexamination Certificate

active

07545299

ABSTRACT:
The invention discloses an analog front end device includes a calibration unit and at least a conversion circuit. The conversion circuit includes a clamper, a multiplexer, an voltage buffer and an analog to digital converter. The clamper receives an image signal and resets the DC voltage level of the image signal to generate a clamped signal. The multiplexer receives the clamped signal and a test signal and outputs the clamped signal or the test signal according to a selecting signal. The voltage buffer amplifies the clamped signal or the test signal to generate a buffer signal. The analog to digital converter converts the buffer signal into a digital signal. The calibration unit generates a gain correction value according to the test signal and calibrates the gain offset of the digital signal according to the gain correction value.

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Analog Devices AD9985 110 MSPS/140 MSPS Analog Interface for Flat Panel Displays, 32 Pages (2004).
Analog Devices ADV7183A Multiformat SDTV Video Decoder,104 pages (2004).

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