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:
Sep. 20, 2005
Filed:
Jun. 08, 2001
Markus Dietl, Munich, DE;
Sotirios Tambouris, Munich, DE;
Markus Dietl, Munich, DE;
Sotirios Tambouris, Munich, DE;
Texas Instruments Deutschland GmbH, Freising, DE;
Abstract
A circuit generating an output phase signal with an optionally variable phase shift relative to a reference phase. It includes an oscillator () outputting phase signals at n outputs, each of which differs in phase by φ=360°/n. These phase signals are applied selectively via multiplexers to a phase interpolator, at the output of which the signal changed in phase relative to a reference phase. The output phase signal is generated in a charging circuit in which a capacitor can be varied by signaling current sources ON/OFF with the aid of phase switches in accordance with the phasing to be produced for the output signal. To avoid jitter in the transition from one phase to another separating switches are inserted in the connection between the current sources and the charging circuit, these separating switches being controlled so that they are never open at the same time.