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:
Oct. 22, 2002
Filed:
Dec. 10, 1998
Shahriar Rabii, Stanford, CA (US);
Level One Communications, Inc., Sacramento, CA (US);
Abstract
An offset window detector that senses the sum of two signals and compares the result to a reference voltage for attenuating an offset voltage and producing a desired gain. The primary design issues of the detector is to achieve a very low voltage offset and a low power dissipation. The detector is part of the offset circuits in the I/Q path of a wireless receiver. The maximum input signal and the minimum input signal are the positive and negative peak values of the in-phase or the quadrature signal paths. They are generated by a peak detector. The offset signal can be estimated by the addition of the maximum input signal with the minimum input signal. This resulting offset signal is compared to the reference voltage to determine if the resulting signal is greater than a maximum reference voltage, less than a minimum reference voltage or within the maximum and minimum voltages. A reference voltage generator creates the desired voltages within a desired tolerance.