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. 14, 2009
Filed:
Aug. 24, 2006
Yasumasa Fujisawa, Kanagawa, JP;
Raymond L. Veith, Portland, OR (US);
Yasumasa Fujisawa, Kanagawa, JP;
Raymond L. Veith, Portland, OR (US);
Tektronix International Sales GmbH, Rheinfall, CH;
Abstract
A signal generator can control phase relationship between output signals of the channels without stopping clocks provided to the channels to enable the circuit operation fast. First and second channelsandhave signal generation blocksandthat have clock phase shift circuitsandmemories, parallel to serial converters and DACs respectively. A phase comparatorcompares data reading clocks from the signal generation blocksandto produce a phase difference signal wherein the data reading clocks are used to read waveform data from the memories within the signal generation blocksandA CPU controls the clock phase shift circuitsandaccording to the phase difference signal to shift phases of the clocks provided to the signal generation blocksandand then makes phase relationship between the output signals of the first and second channelsandas desired.