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:
Jan. 04, 1977
Filed:
Oct. 02, 1975
Robert Nestor Van Sluys, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A switchable compression-expansion device, in which a first and a second impedance are included in the emitter circuits of two emitter followers. The impedances are also included in two isolated signal circuits which are coupled via a current mirror circuit. A selection means maintains one of the two emitter followers in the non-conducting state. The current which is produced in the associated impedance by the conducting emitter follower is coupled to the other impedance by the current mirror arrangement. In the other condition of the selection circuit the reverse occurs so that two complementary transfer functions are realized.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile