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:
Nov. 18, 2003
Filed:
Oct. 25, 2000
Robert Andrew Kertis, Rochester, MN (US);
Peter John Windler, Fort Collins, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A circuit is disclosed which adjusts the phase of a signal within an LC sinusoidal or a ring or other capacitive oscillator. The circuit uses FETs as capacitors. The gates of the FETs are connected to the capacitive node of the oscillator. The variable voltage source changes the state of the FET from depleted to inverted mode or from inverted to depleted mode which in turn dramatically changes the capacitance of the FET. The change of state exists for only a few clock cycles, typically less than five cycles, so that only the capacitance within the oscillator is instantaneously affected which changes adds as incremental/decremental frequency to adjust only the phase of the oscillation frequency. In this fashion, the average oscillation frequency not affected.