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:
Nov. 27, 2007
Filed:
Dec. 12, 2005
Chung-cheng Wang, Taipei Hsien, TW;
Chao-shi Chuang, Tainan Hsien, TW;
Wen-shih LU, Taipei Hsien, TW;
Yu-chang Chen, Taipei, TW;
Chung-Cheng Wang, Taipei Hsien, TW;
Chao-Shi Chuang, Tainan Hsien, TW;
Wen-Shih Lu, Taipei Hsien, TW;
Yu-Chang Chen, Taipei, TW;
Airoha Technology Corp., Hsin-Chu, TW;
Abstract
A method for automatic frequency tuning in a phase lock loop suitable for use in multi-band VCO wireless systems having very limited initial frequency lock times is disclosed. A predetermined subset of VCOs out of a larger bank of VCOs is selected to serve as interpolation points. The interpolation point VCOs are pre-calibrated with a predetermined voltage and the resultingly generated frequency for each of the interpolation point VCOs is stored into memory as a (frequency, VCO) pair, one pair for each interpolation point VCO. When a desired frequency then is given to the system, an appropriate VCO is selected by interpolation using the (frequency, VCO) pairs of the two most adjacent interpolation points for tracking and locking.