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. 24, 1999
Filed:
Feb. 05, 1997
Applicant:
Inventor:
Raghunand Bhagwan, Sunnyvale, CA (US);
Assignee:
Sun Microsystems, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331-8 ; 331 10 ; 331 14 ; 331 17 ; 331 25 ;
Abstract
A voltage controlled current source provides controlled current to a current controlled oscillator in a high frequency phase-locked loop clock generator. The voltage controlled current source receives a first control signal and a set of second control signals indicative of a phase difference between the output signal of the clock signal generator and a reference frequency. It uses those control signals to adjust the current-controlled oscillator. A level shifter coupled to the current-controlled oscillator amplifies the oscillator signals to full rail and adjusts the duty cycle at its output to 50% to produce the clock signal generator output signal.