The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 1977
Filed:
Apr. 07, 1975
Oskar Beckmann, St. Polten, OE;
Siemens Aktiengesellschaft, Munich, DT;
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.