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. 31, 2015
Filed:
Jan. 13, 2012
Yijing Lin, Beijing, CN;
Yijing Lin, Beijing, CN;
Analog Devices, Inc., Norwood, MA (US);
Abstract
A fully on-chip clock generator on an integrated circuit ('IC') includes a frequency detector for receiving a reference current and providing a first voltage; an error integrator for receiving the first voltage from the frequency detector, comparing it with a reference voltage, and providing a control voltage; a voltage controlled oscillator ('VCO') for receiving the control voltage from the error integrator, and providing an output clock; and a logic controller on the IC, coupled between the VCO and the frequency detector, and generating logic control signals for controlling the frequency detector. The fully on-chip clock generator requires no external crystal, but its power consumption is significantly lower than a relaxation oscillator that generates the same clock frequency.