Isabelle M Telliez

US Patent:

6879643, Apr 12, 2005

Filed:

May 17, 2001

Appl. No.:

09/859731

Inventors:

Sébastien Dedieu - St. Martin d'Heres, FR
Frédéric Paillardet - Aix les Bains, FR
Isabelle Telliez - Berkeley CA, US

Assignee:

STMicroelectronics SA - Montrouge

International Classification:

H03K009/00
H04L027/06
H04L027/14
H04L027/22

US Classification:

375316, 348725, 455 302

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.