Source: http://www.google.com/patents/US7974593?dq=7751826
Timestamp: 2016-08-29 00:54:05
Document Index: 610023838

Matched Legal Cases: ['art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'art 16']

Patent US7974593 - Apparatus and method for calibration of gain and/or phase imbalance and/or ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn example of a radio frequency (RF) transmitter system for communication may include a transmit pre-distortion module configured to provide a second transmit calibration signal during a transmit calibration mode based on a first transmit calibration signal and one or more transmit calibration adjustment...http://www.google.com/patents/US7974593?utm_source=gb-gplus-sharePatent US7974593 - Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication systemAdvanced Patent SearchPublication numberUS7974593 B2Publication typeGrantApplication numberUS 12/575,455Publication dateJul 5, 2011Filing dateOct 7, 2009Priority dateJun 23, 2006Fee statusPaidAlso published asCN101507153A, CN101507153B, DE112007001764T5, US7620373, US7907916, US7965988, US20070298733, US20100022199, US20100022200, US20100022208, WO2008002389A2, WO2008002389A3Publication number12575455, 575455, US 7974593 B2, US 7974593B2, US-B2-7974593, US7974593 B2, US7974593B2InventorsJean-Pierre Joseph Cole, David A. Rowe, Craig A. HornbuckleOriginal AssigneeSierra Monolithics, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (14), Non-Patent Citations (8), Referenced by (39), Classifications (10), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetApparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system
US 7974593 B2Abstract
18. An RF transmitter system of claim 11, wherein each of the first transmit input and the third transmit input includes an in-phase input and a quadrature-phase input, wherein each of the first transmit output and the fourth transmit output includes an in-phase output and a quadrature-phase output. Description
This application is a divisional application of U.S. patent application Ser. No. 11/590,278, entitled “APPARATUS AND METHOD FOR CALIBRATION OF GAIN AND/OR PHASE IMBALANCE AND/OR DC OFFSET IN A COMMUNICATION SYSTEM,” filed Oct. 30, 2006, which claims the benefit of priority under 35 U.S.C. �119 from U.S. Provisional Patent Application Ser. No. 60/816,240 entitled “CALIBRATION OR CORRECTION OF QUADRATURE ERRORS AND/OR DC OFFSET ERRORS IN A TRANSMITTER AND/OR RECEIVER,” filed on Jun. 23, 2006, all of which are hereby incorporated by reference in their entirety for all purposes.
The spectrum at the RF output 1032 is shown in FIG. 3( a) according to one aspect of the invention. A desired sideband 3010 a (a calibration signal or a desired portion of a calibration signal after upconversion) is shown at frequency FRF+FBB, and an undesired sideband 3030 a (a calibration signal or an undesired portion of a calibration signal after upconversion) is shown at frequency FRF−FBB. The image rejection (IR) 3020 is the magnitude difference between the desired sideband 3010 a and the undesired sideband 3030 a. The spectrum at the output 1372 of the envelope detector 1370 is shown in FIG. 3( b) according to one aspect of the invention. A desired sideband 3010 b (a calibration signal or a desired portion of a calibration signal) at DC (or at zero frequency) represents the desired sideband 3010 a after being converted to a baseband signal by the envelope detector 1370 and produced at the output 1372. An undesired sideband 3030 b (a calibration signal or an undesired portion of a calibration signal) at frequency 2FBB represents the undesired sideband 3030 a after being converted to a baseband signal by the envelope detector 1370 and produced at the output 1372.
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examinerClassifications U.S. Classification455/114.3, 375/296International ClassificationH04K3/00, H04B1/06Cooperative ClassificationH04B17/104, H04B17/101, H04B17/14, H04B7/08European ClassificationH04B17/00A1T, H04B17/00A3Legal EventsDateCodeEventDescriptionMar 20, 2012ASAssignmentOwner name: JEFFERIES FINANCE LLC, NEW YORKFree format text: GRANT OF SECURITY INTEREST;ASSIGNORS:SEMTECH CORPORATION;SEMTECH NEW YORK CORPORATION;SIERRA MONOLITHICS, INC.;REEL/FRAME:027897/0141Effective date: 20120320May 2, 2013ASAssignmentOwner name: SIERRA MONOLITHICS, INC., CALIFORNIAFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:JEFFERIES FINANCE LLC;REEL/FRAME:030341/0059Effective date: 20130502Owner name: SEMTECH CORPORATION, CALIFORNIAFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:JEFFERIES FINANCE LLC;REEL/FRAME:030341/0059Effective date: 20130502Owner name: HSBC BANK USA, NATIONAL ASSOCIATION, NEW YORKFree format text: SECURITY AGREEMENT;ASSIGNORS:SEMTECH CORPORATION;SEMTECH NEW YORK CORPORATION;SIERRA MONOLITHICS, INC.;REEL/FRAME:030341/0099Effective date: 20130502Owner name: SEMTECH NEW YORK CORPORATION, CALIFORNIAFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:JEFFERIES FINANCE LLC;REEL/FRAME:030341/0059Effective date: 20130502Jan 5, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services