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:
Feb. 29, 2000
Filed:
Mar. 19, 1997
Applicant:
Inventor:
Fang Shen, San Jose, CA (US);
Assignee:
Silicon Magic Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 17 ; 331 / ; 327156 ; 327159 ;
Abstract
Method and circuit aspects for improving lock-in time following power-up in a phase-locked loop are provided. The circuit and method for providing same includes a phase-locked loop, the phase-locked loop comprising a low pass filter, and a pulse generation circuit coupled to the low pass filter. The pulse generation circuit provides a control pulse of predetermined duration to increase a voltage across the low pass filter and reduce lock-in time in the phase-locked loop following power-up. The pulse generation circuit further includes a plurality of logic gates, the plurality of logic gates including a plurality of inverters coupled to a NAND gate.