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:
Mar. 04, 2014
Filed:
Feb. 25, 2013
Analog Devices, Inc., Norwood, MA (US);
Roger W Van Brunt, Santa Cruz, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Apparatus and methods for phase-locked loops (PLLs) are provided. In certain implementations, a PLL includes a voltage controlled oscillator (VCO) including first and second frequency control circuits, which are coupled to first and second frequency control inputs, respectively. Additionally, the PLL can further include a loop filter, a high frequency pole circuit, and a low frequency pole circuit. The high frequency pole circuit can be electrically connected between the loop filter's output and the VCO's first frequency control input, and the low frequency pole circuit can be electrically connected between the loop filter's output and the VCO's second frequency control input.