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:
Aug. 02, 1994
Filed:
Mar. 29, 1993
Applicant:
Inventors:
Steven L Maddy, Boulder, CO (US);
Graeme S Paterson, Boulder, CO (US);
Assignee:
SpectraLink Corporation, Boulder, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ; H03L / ; H03L / ; H03L / ;
U.S. Cl.
CPC ...
331 / ; 331 10 ; 331 14 ; 331 16 ; 331 17 ;
Abstract
A phase locked loop including a switch between a phase detector output and a VCO input to open the PLL during a frequency change is provided. While the PLL is open, an analog error correction signal is generated by sampling any residual error coming from the phase detector, and generating the analog error correction signal to counter the residual error. Once analog error correction signal is available, the switch is closed and the error correction signal is added to the phase detector output and the PLL is allowed to settle to an optimized frequency.