A/D conversion with wide dynamic range

Details A/D conversion with wide dynamic range A/D conversion with wide dynamic range

1998-03-30

1999-12-14

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

A/d converters

348678, H04N 552, H03M 112

Patent

active

060024453

ABSTRACT:
An image data signal processor, that includes a clamp circuit for clamping a DC level of an image data signal to a predetermined level to produce a clamped image data signal, an A/D converter for A/D-converting the clamped image data signal into a digital image data signal based on a lower reference voltage and an upper reference voltage, wherein the predetermined level is a minimum level of the A/D converter, and a reference voltage generating section for generating the lower and upper reference voltages from the digital image data signal to send to the A/D converter.

REFERENCES:
patent: 4831378 (1989-05-01), Baars et al.
patent: 5087973 (1992-02-01), Kawahara
patent: 5121117 (1992-06-01), Rabii
patent: 5164726 (1992-11-01), Bernstein et al.
patent: 5270819 (1993-12-01), Watson
patent: 5719638 (1998-02-01), Noden
patent: 5757440 (1998-05-01), Manges et al.

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