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. 01, 2004
Filed:
Mar. 10, 1999
Shahriar Rabii, Stanford, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
An AGC window detector that senses the sum of an in-phase (I) and a quadrature (Q) peak-to-peak signal swing and compares the signal to a reference voltage for 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 AGC circuits in the I/Q path of a wireless receiver. The signals I , I , Q and Q are the positive and negative peak values of the in-phase and the quadrature waveforms, respectively. They are generated by a peak detector. Thus the differential in-phase and the differential quadrature amplitudes are I −I and Q −Q , respectively. A resulting differential in-phase signal is added to a resulting differential quadrature signal by the detector and 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.