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. 25, 1995
Filed:
Feb. 08, 1993
Heinz Rinderle, Heilbronn, DE;
Hans Sapotta, Heilbronn, DE;
Temic Telefunken Microelectronic GmbH, Hellbronn, DE;
Abstract
An HF mixer stage having a common base circuit comprises an amplifier stage having two amplifier transistors, a switching stage with two transistor pairs each having two emitter-coupled switching transistors, and a switching circuit connected to the switching transistors; the switching transistors of a transistor pair are connected to the collector of the associated amplifier transistor, the bases of the switching transistors are subjected to a heterodyne signal. In accordance with the invention, the two amplifier transistors are of the opposite conductivity type, the emitters of the amplifier transistors are connected to the circuit input, and the two switching transistors of a transistor pair are of the same conductivity type as the associated amplifier transistors.