High resolution and low consumption digital-analog converter

Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C341S144000

Reexamination Certificate

active

07098831

ABSTRACT:
A digital-to-analog converter includes a first section (MSB) that converts the more significant bits of a digital code into a first voltage (Vin) of a multiplicity of discrete voltages that are integral multiples of a predetermined first voltage step (ΔV1). A second section (LSB) of the converter converts the less significant bits of the digital code into a current. The current is transformed into a second voltage of a multiplicity of discrete voltages that are integral multiples of a second voltage step (ΔV2) equal to ½L of the product of the first voltage step (ΔV1) multiplied by a predetermined coefficient, where L is the number of the less significant bits of the digital code to be converted. A summer generates an output voltage (Vout) that is the sum of the second voltage and the product of the first voltage multiplied by the predetermined coefficient. With a view to obtaining a low consumption, the summer has a resistive feedback circuit including a voltage divider (R3, R4). A conversion resistor (R4) that forms part of the voltage divider transforms the current into the second voltage.

REFERENCES:
patent: 4450433 (1984-05-01), Moriyama
patent: 4488144 (1984-12-01), Wollman
patent: 4573036 (1986-02-01), Wondra
patent: 5294927 (1994-03-01), Levinson
patent: 5323159 (1994-06-01), Imamura
patent: 5541597 (1996-07-01), Chi-Mao
patent: 5592165 (1997-01-01), Jackson et al.
patent: 5703588 (1997-12-01), Rivoir et al.
patent: 5831566 (1998-11-01), Ginetti
patent: 6191720 (2001-02-01), Zhang
patent: 6246351 (2001-06-01), Yilmaz
patent: 6486818 (2002-11-01), Nicholson et al.
Chen, et al., “A CMOS Implementation of a Video-Rate Successive Approximation A/D Converter”, IEEE, Jun. 7, 1988, pps. 2577-2580, XP010069442.
European Search Report, EP 03 42 5260, dated Aug. 14, 2003.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

High resolution and low consumption digital-analog converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High resolution and low consumption digital-analog converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution and low consumption digital-analog converter will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3662371

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.