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:
Jul. 29, 2014
Filed:
Mar. 03, 2014
Applicant:
Yen Dang, San Jose, CA (US);
Inventor:
Yen Dang, San Jose, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01); H03K 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention provides a loop filter device and a method for IC designers to adjust the pole or zero location of a phase lock loop (PLL) circuit. The pole and zero location are controlled by an amplifier and some on-chip resistor and capacitor components. The effective capacitance is magnified by the gain of the amplifier. The advantage of the loop filter device and the method according to embodiments of the present invention provides a feasible way to achieve a very low bandwidth in the PLL circuit without a huge external surface-mount capacitor.