Monotonic precise current DAC

Details Monotonic precise current DAC Monotonic precise current DAC

2006-04-11

2006-04-11

Nguyen, Linh V. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S145000

Reexamination Certificate

active

07026971

ABSTRACT:
A monotonic digital-to-analog converter (DAC) for converting a digital input signal into an analog output signal comprises:an input node for receiving the digital input signal having at least M+L bits,an output node for delivering the analog output signal corresponding to the received digital input signal,a coarse conversion block comprising current sources and first switching means for converting M more significant bits of the digital input signal into a coarse block output current,a fine conversion block comprising a current divider and second switching means for converting L less significant bits of the digital input signal into a corresponding current value, the fine conversion block having means for receiving current from a first unselected current source of the coarse conversion block, anda first cascode means for active cascoding the coarse block output current,a second cascode means, for active cascoding the current from the first unselected current source.A method for converting a digital input signal into an analog output signal is also provided.

REFERENCES:
patent: 4292625 (1981-09-01), Schoeff
patent: 4739304 (1988-04-01), Katakura et al.
patent: 5446457 (1995-08-01), Ryat
patent: 5568146 (1996-10-01), Park
patent: 5703586 (1997-12-01), Tucholski
patent: 5781140 (1998-07-01), Kao
patent: 5841384 (1998-11-01), McKay et al.
patent: 5844511 (1998-12-01), Izumikawa
patent: 6037888 (2000-03-01), Nairn
patent: 6329940 (2001-12-01), Dedic
patent: 6329941 (2001-12-01), Farooqi
patent: 6424283 (2002-07-01), Bugeja et al.
patent: 6507304 (2003-01-01), Lorenz
patent: 6583744 (2003-06-01), Bright
patent: 6879276 (2005-04-01), Devendorf et al.
patent: 6906652 (2005-06-01), Bugeja
patent: 2003/0016086 (2003-01-01), Yang
patent: 0 359 315 (1990-03-01), None
patent: 0 397 240 (1990-11-01), None
Chin et al., “A 10-b 125 MHz CMOS Digital-to-Analog Converter DAC with Threshold Voltage Compensated Current Sources,” IEEE Journal Solid State Circuits, pp. 1374-1380, Nov. 11, 1994.
Sumanen et al., “A 10-bit High-Speed Low-Power CMOS D/A Converter in 0.2 mm,” Electronics, Circuits and Systems, 1998 IEEE International Conference on Lisboa, Portugal, pp. 15-18, Sep. 7, 1998.
Communication Pursuant to Article 96(2) EPC, pp. 1-6 (Oct. 13, 2005).

Affiliated with

Also associated with

Rating

Monotonic precise current DAC does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monotonic precise current DAC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monotonic precise current DAC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3548044