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:
Apr. 13, 1982
Filed:
Jul. 18, 1979
Hans Stut, Grobenzell, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Solid-state relay, including a full-wave rectifier bridge having a first and a second d-c terminal, a thyristor having the anode thereof connected to the first terminal and the cathode thereof connected to the second terminal, a first transistor having a load circuit and a control terminal, the load circuit of the first transistor being connected to the gate and the cathode of the thyristor and the control terminal of the first transistor being connected to at least one resistor which is in turn connected to the first terminal, a second transistor having means for supplying a control current thereto and having a load circuit, a Zener diode, and a current amplifier having an input and two input terminals, one input terminal being connected to the Zener diode which is in turn connected to the control terminal of the first transistor and the other input terminal being connected through the load circuit of the second transistor to the gate terminal of the thyristor, the current amplifier having an output and two output terminals, one output terminal being connected to the first terminal through a resistor and the other output terminal being connected to the first terminal.