Failsafe power-up/power-down switch

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

361 91, 307296R, H02H 324

Patent

active

045996725

ABSTRACT:
A power-up/power-down safety switch includes a simple, low-cost circuit having one AND gate, which may be a CMOS IC, one voltage-limiting diode and three resistors. The circuit functions in conjunction with a logic control circuit in a manner which assures that the inhibiting voltage to the logic control circuit V.sub.INH is equal to (or slightly less than) the supply voltage, V.sub.CC (t), until V.sub.CC (t) reaches the minimum required supply voltage for the circuit logic to operate properly. V.sub.INH is then rapidly switched to a low state such that the circuit logic operates without interference. Conversely, when the circuit is turned OFF, the value of V.sub.INH is switched to a high state as soon as the supply voltage reaches the minimum value to operate the logic circuit thereby again causing the logic outputs to go low and that all the drive signals to the power switch are in the OFF state.

REFERENCES:
patent: 3043966 (1962-07-01), Norman
patent: 3624617 (1971-11-01), Elizabeth et al.
patent: 3703648 (1972-12-01), Wrabel
patent: 3757302 (1973-09-01), Pollitt
patent: 3918043 (1975-12-01), Beck
patent: 3969635 (1976-07-01), Wilke
patent: 4266145 (1981-05-01), Amacher et al.
patent: 4428020 (1984-01-01), Blanchard
patent: 4446499 (1984-05-01), Kishimoto et al.
patent: 4473759 (1984-09-01), Mahabadi
patent: 4493000 (1985-01-01), Edwards
patent: 4536667 (1985-08-01), Masuda

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

Failsafe power-up/power-down switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Failsafe power-up/power-down switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Failsafe power-up/power-down switch will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1454951

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