Circuit arrangement for wireless transmission of a control signa

Details Circuit arrangement for wireless transmission of a control signa Circuit arrangement for wireless transmission of a control signa

1975-04-07

1977-05-17

Safourek, Benedict V.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325 48, 325 30, 325392, 340171R, 343225, H04B 100

Patent

active

040244741

ABSTRACT:
A circuit arrangement for the wireless transmission of a control signal to the control path of a controllable semiconductor valve, in particular a thyristor, is disclosed. The arrangement comprises a high-frequency transmitter in which a high frequency carrier signal is modulated by the output of a modulator. The latter modulator is responsive to the control signal and develops an output signal which includes first and second subcarrier signals having different subcarrier frequencies. Specifically, the output comprises the first subcarrier when the control signal is in a condition associated with the ignition state of the valve and comprises the second subcarrier when the control signal is in a condition associated with the extinguished state of the valve.
The circuit additionally includes a high frequency receiver which receives the high frequency carrier and recovers therefrom the aforesaid modulator output. The portion of such output comprising the first subcarrier frequency is then used to ignite the semiconductor valve, while the portion thereof comprising the second subcarrier frequency is used to extinguish or block ignition of the valve.

REFERENCES:
patent: 2839604 (1958-06-01), Shank
patent: 3142723 (1964-07-01), Fleming
patent: 3160812 (1964-12-01), Scantlin
patent: 3521267 (1970-07-01), Lester et al.
patent: 3522536 (1970-08-01), Reynolds
patent: 3638174 (1972-01-01), Haase et al.
patent: 3683278 (1972-08-01), Ohnsorge et al.
patent: 3747108 (1973-07-01), Ringer
patent: 3823385 (1974-07-01), Kitamura

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