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. 10, 2012
Filed:
Aug. 25, 2009
Yann Le Guillou, Caen, FR;
Yann Le Guillou, Caen, FR;
NXP B.V., Eindhoven, NL;
Abstract
A basic symmetric Π/2 phase-detector receives four control signals that control a differential current at the detector's output. Each respective control signal is a linear combination of a respective pair of signals chosen from a first input signal, its logic complement, a second input signal and the logic complement of the latter. Operation is based on time-averaging the differential current, the result being zero at a phase difference of Π/2. By means of adding one or more additional current sources to the output, controlled by one or more of the control signals, the basic operation is skewed. The time-averaged output current is now made zero only at a value of the phase difference different from Π/2. In an embodiment with uniform current sources and resistors, the modified detector is configured for a phase difference of Π/2.