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Method and system for calibration in an fm transceiver system with off-chip control

Method and system for calibration in an fm transceiver system with off-chip control description/claims

This application makes reference to, claims priority to, and claims the benefit of U.S. Provisional Application Ser. No. 60/895,665, filed on Mar. 19, 2007.

The above referenced application is hereby incorporated herein by reference in its entirety.

Certain embodiments of the invention relate to signal processing for communication systems. More specifically, certain embodiments of the invention relate to a method and system for calibration in an FM transceiver system with off-chip control.

Electronic communication has become prolific over the last decade. While electronic communication was initially limited to the desktop, recent trends have been to make communications, media content and the Internet available anytime, anywhere and, increasingly, on any device. Already now, it is quite common to find mobile devices such as cellular phones or Personal Digital Assistants (PDAs) that incorporate a large range of communication technologies and associated software. For example, fully-featured web-browsers, email clients, MP3 players, instant messenger software, and Voice-over-IP may all be found on some recent devices.

In this same spirit of the ‘anytime, anywhere’ paradigm, there is a drive towards making portable devices ever more capable and smaller, while making stored content available on a variety of displays and user interfaces. For example, many portable media devices may be enabled to provide a video output signal to a computer monitor or a television to allow display of, for example, digital photographs. For audio content, one possible output format may be a low-power FM transmission signal. Recent changes, for example, in European regulation by CEPT/ETSI to the category of Short Range Devices (SDR) may now permit the use of very low power FM transmitters to transmit in the FM radio broadcast spectrum at powers of around 50 nW.

Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of such systems with some aspects of the present invention as set forth in the remainder of the present application with reference to the drawings.

A method and/or system for calibration in an FM transceiver system with off-chip control, substantially as shown in and/or described in connection with at least one of the figures, as set forth more completely in the claims.

These and other advantages, aspects and novel features of the present invention, as well as details of an illustrated embodiment thereof, will be more fully understood from the following description and drawings.

FIG. 1 is a block diagram illustrating an exemplary FM transceiver system, in accordance with an embodiment of the invention.

FIG. 2A is a block diagram illustrating an exemplary FM calibration system, in accordance with an embodiment of the invention.

FIG. 2B is a block diagram illustrating an exemplary FM calibration system with a single programmable phase shift, in accordance with an embodiment of the invention.

FIG. 2C is a block diagram illustrating an exemplary power amplifier calibration, in accordance with an embodiment of the invention.

FIG. 3 is a flow chart illustrating an exemplary sequential I/Q mismatch calibration protocol, in accordance with an embodiment of the invention.

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