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:
Apr. 12, 2005
Filed:
May. 17, 2001
Process and device for controlling the phase shift between four signals mutually in phase quadrature
Sébastien Dedieu, St. Martin d'Heres, FR;
Frédéric Paillardet, Aix les Bains, FR;
Isabelle Telliez, Berkeley, CA (US);
Sébastien Dedieu, St. Martin d'Heres, FR;
Frédéric Paillardet, Aix les Bains, FR;
Isabelle Telliez, Berkeley, CA (US);
STMicroelectronics SA, Montrouge, FR;
Abstract
At least a first base signal and a second base signal are mutually in quadrature and both are capable of mutually exhibiting a quadrature error. These signals are used to formulate two pairs of delayed signals that includes a first delayed signal that is delayed with respect to the first base signal, a second signal delayed in phase opposition with respect to the first delayed signal, a third signal delayed with respect to the second base signal, and a fourth delayed signal in phase opposition with respect to the third delayed signal. The value of each of the delays is continuously adjusted using two differential signals arising from a direct or an indirect cross-mixing of the two pairs of delayed signals to obtain the four delayed signals virtually in quadrature.