Proximity controlled power switching circuit

Details Proximity controlled power switching circuit Proximity controlled power switching circuit

1979-05-25

1981-01-20

Beha, Jr., William H.

Electricity: power supply or regulation systems

External or operator controlled

Using a three or more terminal semiconductive device as the...

307116, 307308, 323904, H03K 1796, H03K 17945

Patent

active

042465338

ABSTRACT:
A switching circuit controlled by the approach of a body into close proximity to its probe and operative to control the flow of power from an AC source to a load using a silicon control switching device enabled by an oscillator generating narrow gate pulses whenever the oscillator is in turn enabled by a flip-flop, which disables the oscillator in its first stable state and which enables the oscillator in its second stable state. Ambient electrical signals picked up by the probe are shaped into suitable form for triggering the flip-flop from one to the other of said stable states, and the shaping circuitry and the flip-flop comprise CMOS integrated circuits which are used for the purpose of achieving very low current drain and high sensitivity to an increase in ambient signals picked up at the probe, means being provided to adjust threshold sensitivities of the shaping circuit.

REFERENCES:
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patent: 3200304 (1965-08-01), Atkins et al.
patent: 3309690 (1967-03-01), Moffitt
patent: 3770981 (1973-11-01), Nelsen
patent: 3811054 (1974-05-01), Wern et al.
patent: 3965465 (1976-06-01), Alexander
patent: 4002923 (1977-01-01), Larson et al.
patent: 4031408 (1977-06-01), Holz
patent: 4037221 (1977-07-01), Alexander
patent: 4081700 (1978-03-01), Hamilton
patent: 4159473 (1979-06-01), Senk
Electronic Engineering, pp. 14, 15, Jul., 1975.

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