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:
Dec. 17, 2002
Filed:
Apr. 19, 2001
Phase detector for automatically controlling offset current and phase locked loop including the same
Applicant:
Inventor:
Tae-won Ahn, Seoul, KR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 ;
U.S. Cl.
CPC ...
H03L 7/00 ;
Abstract
A phase detector includes a Gilbert block for outputting a signal proportional to a phase difference between first and second input signals to a first output terminal, and a current source for determining a current in the first output terminal. The current source is controlled by a reference current signal. A converter outputs a current to a second output terminal in response to the signal output from the first output terminal. A variable current source varies the current output to the second output terminal. A controller controls the variable current source in response to the first and second input signals.