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:
Jun. 05, 2007
Filed:
Dec. 02, 2005
Sheng-lyang Jang, Taipei, TW;
Shao-hua Lee, Danshuei Township, Taipei County, TW;
Sheng-Lyang Jang, Taipei, TW;
Shao-Hua Lee, Danshuei Township, Taipei County, TW;
National Taiwan University of Science and Technology, Taipei, TW;
Abstract
The present invention is related with a dual-band LC voltage controlled oscillator, which utilizes a substantial amount of feedback loop paths in the circuit. The circuit is a core of a substantial amount of communication ICs. The voltage controlled oscillator can provide wide-band or dual-band radio frequency generation, and it utilizes a switch controlled circuit to select one of the feedback loops in order to choose the assigned frequency band output. Generic wide-band or dual-band LC voltage controlled oscillations are obtained by switching parallel-connected capacitors or switching inductor array, in contrast, the present invention is used for switching several parallel connected feedback loops, each of which associated with an LC tank forms an oscillation frequency output. Utilizing the switch to control the feedback loop and integrating different band oscillator circuit is capable of saving chip's size and power consumption.