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. 20, 2001
Filed:
Dec. 22, 1999
Applicant:
Inventors:
Helmut Herrmann, München, DE;
Stefan Herzinger, München, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/24 ; H03D 1/300 ;
U.S. Cl.
CPC ...
H03D 3/24 ; H03D 1/300 ;
Abstract
In a digital phase-frequency detector with anti-backlash pulses, which prevent the mapping of very short correction pulses occurring on the basis of small phase differences by use of an AND logic circuit controlling the RESET of two flip flop circuits, a waste time is shortened by reducing a duration of the RESET pulse. The integrable phase-frequency detector according to the invention can be used in fast digital phase-locked control loops, for example for tuners, frequency synthesizers in the field of mobile radio.