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. 17, 2001
Filed:
Oct. 23, 1998
Alexander Eban, Barkan, IL;
Texas Insturments Israel Ltd., Kfar Saba, IL;
Abstract
A radio frequency oscillator containing a means of frequency band selection and a tuning mechanism permitting frequency variation within each of the bands. The oscillator typically consists of a transistor, a frequency determining circuit, one or more voltage controlled variable capacitance diodes for frequency tuning and frequency range switching means to step change the operating frequency. The frequency determining circuit can consist of a lumped inductor, a microstrip line or a combination of a microstrip line and a lumped inductor. The frequency determining circuit is typically connected to the base of the transistor. In a preferred embodiment the frequency range switching is accomplished using an RF switching diode, used to short out one or more portions of the tuned microstrip line in accordance with the required frequency step change. The circuit also incorporates additional circuitry to support frequency modulation.