Time delay circuit

Details Time delay circuit Time delay circuit

1975-06-30

1977-01-04

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307246, 307251, 320 1, 102 702R, H03K 1726, H03K 1756, H03K 513

Patent

active

040016102

ABSTRACT:
An electric timing circuit for the time delayed delivery of a voltage pulse to an electric fuze element or other current or voltage sensitive element uses a capacitor voltage source which can be charged from an external source of electric potential. The capacitor discharges through the leakage resistance of its dielectric and through leakage resistance of semiconductor devices in the biased "off" state, until the capacitor voltage decreases to a preset value, at which time a threshold value switch connects the electric element to the capacitor voltage source. The threshold value switch is constituted by two series connected Field Effect Transistors, one N channel type and one P channel type. Both transistors are biased in the "off" condition by the circuit connections until the capacitor voltage decreases to the threshold level and turns both transistors "on". The two non-conducting transistor channels in series permit a very long discharge time for a given capacitor. One embodiment of the invention utilizes the negligible current threshold switch in series with the gate circuit of a thyristor to trigger the thyristor and permit a large current flow through the thyristor and the series connected electric element. A second embodiment of the invention uses the two-transistor threshold switch in series with a sensitive electric element.

REFERENCES:
patent: 3700968 (1972-10-01), Spies
patent: 3732823 (1973-05-01), Held et al.
patent: 3787740 (1974-01-01), Salton et al.
patent: 3862441 (1975-01-01), Nabetani et al.
"Negative Resistance Circuit Using Two Complementary Field Effect Transistors" in Proceedings of the IEEE, vol. 53, No. 4, Apr. 1965 - p. 404.

Affiliated with

Also associated with

Rating

Time delay circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-256723