Data acquisition circuit which changes a range of a...

Details Data acquisition circuit which changes a range of a... Data acquisition circuit which changes a range of a...

2006-09-05

2006-09-05

Hsia, Sherrie (Department: 2622)

Television

Image signal processing circuitry specific to television

A/d converters

C348S691000

Reexamination Certificate

active

07102693

ABSTRACT:
An A/D converter updates its reference potential so that it coincides with an analog potential of a video signal. The A/D converter changes a variable voltage range of the reference potential during the same horizontal synchronizing period based upon a horizontal synchronizing signal. It is possible to correctly discriminate data superposed on the video signal even if an analog potential of the video signal considerably varies during the same horizontal synchronizing period.

REFERENCES:
patent: 4491869 (1985-01-01), Heitmann
patent: 07202696 (1995-08-01), None

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