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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.:

US 6836191 B1

PDFFull Text
Expired
Date of Patent:
Dec. 28, 2004

Filed:

May. 12, 2003

Voltage-controlled oscillator having a transmission line between a resonator and a variable capacitance diode, high-frequency module including the same, and communication apparatus including the same

Applicant:
Inventors:

Masanori Fujidai, Yokohama, JP;

Hiroshi Nishida, Yokohama, JP;

Takahiro Baba, Yokohama, JP;

Satoshi Shinoda, Sagamihara, JP;

Koichi Sakamoto, Yokohama, JP;

Assignee:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Attorney:

Keating & Bennett, LLP

Primary Examiner:

Robert Pascal

Assistant Examiner:

Joseph Chang

Int. Cl.
CPC ...
H03B 5/12 ;
U.S. Cl.
CPC ...
H03B 5/12 ;
Abstract

A voltage controlled oscillator includes a resonant circuit which is connected with an active circuit. In the resonant circuit, a variable capacitance diode is connected with a resonator via a transmission line, and a capacitive circuit is connected in parallel with the variable capacitance diode. By setting the length of the transmission line to an appropriate value ranging from, for example, about one quarter to about one half of the wavelength of the resonant frequency, the frequency change width can increase, while maintaining the frequency linearity because of connection of the capacitive circuit.

Find Patent Forward Citations

Fujidai, Masanori. (2004). Voltage-controlled oscillator having a transmission line between a resonator and a variable capacitance diode, high-frequency module including the same, and communication apparatus including the same (U.S. Patent No. 6836191). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6836191

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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