Digitally controlled system for effecting and presenting a selec

Details Digitally controlled system for effecting and presenting a selec Digitally controlled system for effecting and presenting a selec

1987-07-15

1989-07-18

Lall, Parshotam S.

Boots, shoes, and leggings

364481, 324 62, 323354, G01N 2704, G05B 2402

Patent

active

048499030

ABSTRACT:
A digitally controlled resistance generator (10) in which resistors (16-38) having values selected according to an expression 2.sup.N-1 (R), where N is equal to the number of terms in the expression, and R is equal to the lowest value of resistance, are electrically inserted into a resistive circuit in accordance with a parallel binary signal provided by an analog-to-digital converter (46) or a programmable computer (75). This binary signal is coupled via optical isolators (50-72) which, when activated by a logical "1," provides a negative potential to some or all of the gate inputs (96) of the normally "on" field effect transistors (98-120) which, when "on," shorts out the associated resistor. This applied negative potential turns the field effect transistors "off" and electrically inserts the resistor coupled between the source terminal (124) and the drain terminal (122) of that field effect transistor into the resistive circuit between the terminals (12, 14).

REFERENCES:
patent: 3947701 (1976-03-01), Russell, Jr.
patent: 4261038 (1981-04-01), Johns et al.
patent: 4575714 (1986-03-01), Rummel
patent: 4713602 (1987-12-01), Ueda
patent: 4728881 (1988-03-01), Evans et al.
"Binary Programmed Power Supply", by B. E. Bachman, IBM Tech. Discl. Bulletin, vol. 9, No. 10, Mar. 1967, p. 1330.

Affiliated with

Also associated with

Rating

Digitally controlled system for effecting and presenting a selec does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digitally controlled system for effecting and presenting a selec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitally controlled system for effecting and presenting a selec will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-176770