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:
Nov. 11, 2008
Filed:
Feb. 07, 2006
Jesse E. Chen, Sunnyvale, CA (US);
Pengfei Zhang, Shanghai, CN;
Jesse E. Chen, Sunnyvale, CA (US);
Pengfei Zhang, Shanghai, CN;
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
A system and method are provided for compensating for an I/Q mismatch of a receiver in a mobile terminal. In general, the receiver and a transmitter of the mobile terminal are formed on a single substrate. A transmit signal is transmitted via the transmitter. Due to leakage through the substrate, the transmit signal is provided to one or more points in the receiver. One of these points is an input of the amplifier circuitry. A gain of the amplifier circuitry is modulated during reception of the transmit signal such that an amplified signal provided by the amplifier circuitry is offset from the carrier frequency of the transmit signal by a known frequency offset. The amplified signal is downconverted to provide a quadrature output signal. Processing circuitry processes frequency components of the quadrature output signal corresponding to the known frequency offset to determine the I/Q mismatch of the receiver.