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:
Aug. 20, 1991
Filed:
Mar. 15, 1990
Hans Kriedt, Munich, DE;
Heinz Zietemann, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A monolithically integratable transistor circuit for limiting transient positive high voltages on an electric conductor includes a pnp transistor being conductive only upon exceeding a predetermined potential threshold value being positive as compared with a reference potential. The pnp transistor has an emitter terminal connected to an electric conductor, a collector terminal connected to the reference potential, and a base terminal. A parallel circuit is connected between the base terminal and the electric conductor. The parallel circuit has a high-impedance resistor and a first capacitor. A second capacitor is connected between the base terminal and the reference potential.