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:
Oct. 11, 2011
Filed:
Jan. 15, 2010
Chih-hsiang Chang, Taichung, TW;
Jung-mao Lin, Taichung, TW;
Ching-yuan Yang, Taichung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A voltage controlled oscillator (VCO) includes a voltage controlled current source (VCCS), a negative resistance circuit (NRC), a first transformer, a second transformer, a first transistor and a second transistor. A current terminal of the VCCS receives a control voltage. First terminals of first and second current paths in the NRC are coupled to a current terminal of the VCCS. Primary sides of the first and the second transformers are respectively coupled to second terminals of the first and the second current paths. Secondary sides of the first and the second transformers are first and second output terminals of the VCO, respectively. First terminals of the first and the second transistor are respectively coupled to the secondary sides of the first and the second transformers. Control terminals of the first and the second transformers are respectively coupled to the primary sides of the first and the second transformers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile