Ramp generator

Details Ramp generator Ramp generator

2005-01-11

2005-01-11

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

06842135

ABSTRACT:
A ramp generator includes a resistance ladder (10) supplied with a constant current. Switches are closed in sequence on the resistance ladder to generate the ramp voltage. By using control logic to decode the sequence, a looped shift register is used to close the switches.

REFERENCES:
patent: 4447747 (1984-05-01), LaPotin
patent: 5604501 (1997-02-01), McPartland
patent: 5703588 (1997-12-01), Rivoir et al.
patent: 5945870 (1999-08-01), Chu et al.
patent: 6023133 (2000-02-01), Leung et al.
patent: 6617989 (2003-09-01), Deak
patent: 1298800 (2003-04-01), None
Bailey , “Ramp Generator For Image sensor ADC ”, U.S. Appl. No. 10/254,443, filed Sep. 25, 2002.

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