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:
Nov. 25, 1986
Filed:
Jun. 21, 1985
John Ma, Milpitas, CA (US);
Capetronic (BSR) Ltd., Kowloon, HK;
Abstract
A voltage controlled oscillator (VCO) for a television tuner for tuning a large number of television channels, including signals in the microwave frequency range, the VCO comprising a printed circuit (PC) board having a dielectric substrate, a patterned metal layer on one side of the substrate, and a substantially continuous metal layer forming a ground plane on the other side of the substrate, a transistor mounted on the ground plane side of the PC board, and having emitter, base and collector leads projecting laterally from the transistor, the base of the transistor being connected to the ground plane, a d-c supply circuit connected to the transistor, a tuned circuit connected across the collector and emitter of the transistor, the tuned circuit including at least one ground connection to the ground plane of the PC board, the d-c supply circuit, the tuned circuit, and the transistor having values which produce an oscillating output at a frequency of at least one GHz, and the ground connections being interconnected by a continuous wide area of the ground plane to provide a short-distance, low-loss path for ground currents at the operating frequency of the VCO.