Digital circuit generating a vital relay

Details Digital circuit generating a vital relay Digital circuit generating a vital relay

1978-03-02

1979-09-18

Smith, Jerry

Boots, shoes, and leggings

328129, 364200, 364484, G06F 1520

Patent

active

041685261

ABSTRACT:
A microprocessor based vital delay circuit is provided which is arranged to emit an output no less than a predetermined time after an input stimulus. The predetermined time, which corresponds to the delay, is controlled by selecting the relationship between two quantities. A digital processor performs a series of computations on the two quantities, each computation is arranged to take unit time and by selecting the proper relationship between the two quantities, the total series of computations takes a predetermined amount of time. Before the output is allowed to occur, several checks are performed to insure that no hardware or software failures have erroneously generated the result. One novel checking technique insures that the clock frequency has not changed, and this technique is applicable to a wide variety of devices in which digital techniques are employed.

REFERENCES:
patent: 4044272 (1977-08-01), Darrow
patent: 4072852 (1978-02-01), Hogan et al.

Affiliated with

Also associated with

Rating

Digital circuit generating a vital relay 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 circuit generating a vital relay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital circuit generating a vital relay will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-900556