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:
Sep. 24, 2002
Filed:
Dec. 22, 2000
Teruaki Oshita, Nagaokakyo, JP;
Shinji Goma, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A voltage-controlled oscillator has a frequency of oscillation that is varied using a substrate on which the same circuit pattern as that of the voltage-controlled oscillator is printed. In a resonant circuit included in the voltage-controlled oscillator, a first land is arranged substantially parallel to an inductor. A second land is arranged substantially parallel to the inductor and to a variable-capacitance diode. The capacitances of capacitors attached to the first land and second land are changed in order to vary the frequency of oscillation of the voltage-controlled oscillator. The frequency of oscillation can be varied without the necessity of scraping the inductor through which a major signal passes. Therefore, electrical characteristics of the voltage-controlled oscillator are not degraded and the frequency of oscillation is very steady. The frequency of oscillation can be varied merely by changing the capacitances of the capacitors attached to the first and second lands. Consequently, a step of scraping a strip line can be excluded, and manufacturing efficiency can be improved.