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. 10, 1979
Filed:
May. 09, 1977
David H Chung, Palo Alto, CA (US);
Frederic S Haynes, Atherton, CA (US);
Other;
Abstract
A method and apparatus is described for applying a video composite signal to the antenna input of a television receiver while at the same time electrically isolating such input from the equipment which generates the composite signal. The method includes the step of connecting to the antenna input a modulator for the composite signal having an optical sensor at its input for receiving optical radiation defining the composite signal, and converting the same into an electrical signal providing information to the modulator defining such composite signal. It further includes transmitting to the optical sensor optical radiation defining the desired composite signal. The apparatus includes the combination of an oscillator for generating a carrier signal, a modulator for modulating the carrier signal with a composite signal, and an optical sensor connected to the input of the modulator which receives optical radiation defining the composite signal and converts the same to an electrical control signal for the modulator defining the desired composite signal.