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. 07, 2004
Filed:
Mar. 26, 2003
Jonathan Ashley, Los Gatos, CA (US);
Matthias Driller, Santa Cruz, CA (US);
Infineon Technologies North America Corp., San Jose, CA (US);
Abstract
A phase error estimate value between an actual interpolated sample time and an ideal interpolated sample time of an analog signal is selected by circuitry based on a quotient (z −z )/(z −z ), where z , z , z , and z are four successive synchronous samples of the analog signal. A sign of the phase error estimate value is selected by circuitry based on a comparison of predetermined differences between the four successive synchronous samples. The phase error estimate value can be adjusted by circuitry when an absolute value of the phase error estimate value exceeds a predetermined threshold and a closest sampling phase according to a difference between (z −z ) and (z −z ) differs from a phase predicted by a hysteresis state.