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. 07, 2009
Filed:
Sep. 28, 2004
Dominicus Martinus Wilhelmus Leenaerts, Eindhoven, NL;
Nenad Pavlovic, Eindhoven, NL;
Ketan Mistry, Leicester, GB;
Dominicus Martinus Wilhelmus Leenaerts, Eindhoven, NL;
Nenad Pavlovic, Eindhoven, NL;
Ketan Mistry, Leicester, GB;
ST Wireless SA, Plan-les-Ouates, CH;
Abstract
A phase-switching dual modulus prescaler having a dual modulus divider is provided. Said divider comprises a first and second divide-by-2 circuit (A;B), wherein said second divide-by-2 circuit (B) is coupled to the output of said first divide-by-2 circuit (A) and at least said second divide-by-two circuit (B) comprises a four phase output each separated by 90°. A phase selection unit (PSU) is provided for selecting one of the four phase outputs (I, Q, Q; INi, INni, INq, Innq) of the second divide-by-2 circuit (B). Moreover, a phase control unit is provided for providing control signal (C, NC; C, NC; C, NC) to the phase selection unit, wherein the phase selection unit (PSU) performs the selection of the four phase outputs (I, I, Q, Q; INi, INni, INq, Innq) according to the control signals (C, NC; C, NC; C, NC). Said phase selection unit (PSU) is implemented based on direct logic. The implementation of the phase selection unit based on direct logic enables a higher speed and saves area on the chip.