Touch control switch

Details Touch control switch Touch control switch

1978-03-13

1980-07-01

Hix, L. T.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307157, H03K 1768

Patent

active

042108225

ABSTRACT:
A touch control switch suitable for connection between a lamp load and a supply circuit in a lighting installation for alternating current and comprising a semiconductor switching element with a gate electrode, a counting circuit with a forward stepping input and a digital control output connected to the gate electrode of the semiconductor switching element via a trigger pulse generating circuit for controlling the conduction of the semiconductor switching element in dependence on the condition of activation of the digital control output, and a control pulse shaping circuit having an output connected to the forward stepping input of the counting circuit and a first and second input terminal for connection to a first and second, respectively terminal of the supply circuit via a touch sensitive impedance. The trigger pulse generating circuit comprises an edge-triggered mono-pulse generating circuit that has a first input for leading edge triggering and a second input for trailing edge triggering jointly connected to the supply circuit.

REFERENCES:
patent: 3811054 (1974-05-01), Wern
patent: 4159473 (1979-06-01), Senk

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