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. 28, 1977
Filed:
Feb. 26, 1976
Waymon A Melvin, Jr, Raleigh, NC (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A half-duplex communication repeater for use with power distribution lines. The repeater includes two receivers, two signal generators, a single power amplifier, and a control circuit. The control circuit coordinates the operation of the receivers and the signal generators and prevents the application of the signals from both generators simultaneously to the signal amplifier. The outputs of the two signal generators are applied to transmission gates which are both coupled to the signal amplifier. When an appropriate signal is detected by one receiver, it produces an output signal which is coupled to a latching circuit. The latching circuit turns on the appropriate transmission gate to pass the signal from the corresponding signal generator to the signal amplifier. Due to the operation of the latching circuit, a signal detected simultaneously by the other receiver will not cause the other transmission gate to turn on and apply two signals simultaneously to the signal amplifier. A third transmission gate may be coupled to the common output connections of the other two transmission gates for providing a load on the gate devices to reduce the signal transfer through the gate devices when they are in the turned-off condition.