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:
Jun. 26, 1990
Filed:
Nov. 02, 1988
Adrianus Sempel, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The collectors of two transistors T.sub.5 and T.sub.6 constitute a first and a second collector terminal to which a load circuit can be connected. The base signal currents of T.sub.5 and T.sub.6 are added to their collector signal currents or subtracted from their emitter signal currents by a first difference pair T.sub.7, T.sub.8 and a second difference pair T.sub.9, T.sub.10. The signal current in the first and the second collector terminal is thus very accurately equal to the input signal current at the emitters of T.sub.5 and T.sub.6. Due to the high voltage gain of the first and the second difference pair, T.sub.5 and T.sub.6 are substantially completely turned on. A double-balanced mixer circuit having a large dynamic range is provided by a load circuit having two cross-coupled differential amplifiers T.sub.1, T.sub.2 and T.sub.3, T.sub.4.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile