Digital to analog conversion circuit including compensation FET'

Details Digital to analog conversion circuit including compensation FET' Digital to analog conversion circuit including compensation FET'

1980-01-25

1981-05-12

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, H03K 1302

Patent

active

042675502

ABSTRACT:
The disclosed digital to analog conversion circuit is comprised of a plurality of resistors interconnected as an N stage R-2R ladder network, a pair of conductive buses, and a total of N transistorized switches which respectively couple the output legs of the ladder to a selectable one of the buses in response to digital logic signals. Those switches which couple to the legs of the K most significant stages have scaled resistances that differ by powers of two; whereas the remaining switches have resistances which equal the largest scaled resistance. An MOS transistor lies in the serial leg of the Kth stage. This transistor has a resistance of approximately 2/3 the largest scaled resistance of the switches. The unscaled resistances provide for ease of fabrication, while the MOS transistor improves the accuracy with which digital to analog conversions are performed.

REFERENCES:
patent: 3540037 (1973-11-01), Ottesen
patent: 3611355 (1971-10-01), Hartke
patent: 3699568 (1972-10-01), Thompson
patent: 3747088 (1973-07-01), Pastoriza
patent: 3755807 (1973-08-01), Brown
patent: 3828345 (1974-08-01), Lode
patent: 3832707 (1974-08-01), Buchanan
patent: 3842412 (1974-10-01), Spofford
patent: 3882484 (1975-05-01), Brokaw
patent: 3890611 (1975-06-01), Pastoriza
patent: 3940760 (1976-02-01), Brokaw
patent: 4055773 (1977-10-01), Schoeff

Affiliated with

Also associated with

Rating

Digital to analog conversion circuit including compensation FET' does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital to analog conversion circuit including compensation FET', we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital to analog conversion circuit including compensation FET' will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2049949