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:
Jun. 27, 2006
Filed:
May. 28, 2004
Zaw Min Soe, Encinitas, CA (US);
Zaw Min Soe, Encinitas, CA (US);
Wionics Research, Irvine, CA (US);
Abstract
Delays are produced in differential signals using a variable capacitance provided by MOS varactors coupled between the differential signals. The capacitance values of the MOS varactors is controlled by a bias voltage applied to the bodies of the varactors. Selective application of bias voltages to the MOS varactors may be employed to selectively delay one pair of differential signals with respect to another pair of differential signals so as to change the relative phases of the signals. A logic circuit may be used to control the application of bias voltage to the MOS varactors so that signal phases may be adjusted in a manner that is predictable and programmable. These methods may be implemented to compensate for phase offsets between in-phase and quadrature signals of a local oscillator.