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. 10, 1998
Filed:
Dec. 22, 1995
Applicant:
Inventors:
Jaideep Prakash, Dallas, TX (US);
Robert Rudolf Rotzoll, Allen, TX (US);
Assignee:
Microtune, Inc., Plano, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
375376 ; 331 22 ; 331 47 ;
Abstract
A monolithic device is shown having a number of phase locked loops (PLLs) constructed thereon. At least one of the PLLs is constructed as a multiple loop having an output of one PLL loop tied back to the feedback path of the other loop of the pair. In this manner, tight resolution can be obtained in one loop while the bandwidth of that loop is coarse. The bandwidth of the second loop is tight, thereby giving good resolution to the first loop while still avoiding the problems inherent with noise injection locking from other PLLs on the same device.