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. 24, 1982
Filed:
Apr. 21, 1980
Klaus-Dieter K Brockmann, Hilversum, NL;
Teunis A van Harreveld, Hilversum, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A hybrid circuit for coupling a two wire transmission path to a receive path and a transmit path of a four-wire transmission path comprises a receive port, a transmit port, and a two-wire port. The receive port is connected to a non-inverting input of a differential amplifier whose output is connected via a winding of a transformer to an impedance. The inverting input of amplifier is connected via a winding to the junction of winding and impedance. The transmit port is connected via a winding W3 to the junction of winding and impedance. The two wire port is connected to a winding on the transformer. Signals applied to the receive port are coupled to the two-wire port but produce voltages across the impedance and winding which cancel to the transmit port whereas signals applied to the two-wire port are transferred to the transmit port. The use of the amplifier enables a smaller transformer to be used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile