Method and system for RF front-end calibration scheme using...

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency

Reexamination Certificate

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Reexamination Certificate

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08081941

ABSTRACT:
Aspects of a method and system for an RF front-end calibration scheme using signals from a fractional-N frequency synthesized and received signal strength indicator (RSSI) are provided. A frequency synthesizer within a wireless receiver may generate a signal for dynamically modifying a gain in an integrated low-noise amplifier (LNA) for each selected receiver channel. The frequency-synthesized signals may be applied to at least one tunable load communicatively coupled to the LNA. The tunable load may be an input load or an output load. The signal generated by the frequency synthesizer may be sequentially applied to the input load and the output load. A logarithmic amplifier may generate an RSSI signal from the LNA output during the calibration process. The RSSI signal may be utilized for controlling a tunable load coupled to the LNA and optimize the tuning of the LNA in a desired channel by adjusting the tunable load.

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patent: 2006/0068740 (2006-03-01), Yokoyama
Takeuchi et al. “asingle chip RF front end for the digital sound broadcasting” by SONY Corporation. Jun. 25, 2001.
Patrick Antonine, et al., “A Direct-Conversion Receiver for DVB-H”, IEEE Journal of Solid-State Circuits, vol. 40, No. 12, Dec. 2005, pp. 2536-2546.
Mark Dawkins, Alison Payne Burnett, Nick Cowley, “A Single-Chip Tuner for DVB-T”, IEEE Journal of Solid-State Circuits, vol. 38, No. 8, Aug. 2003, pp. 1307-1317.
EICTA—European Industry Association, Information Systems Communication Technologies Consumer Electronics, EICTA/TAC/MBRAI-0216, “Mobile and Portable DVB-T Radio Access Interface Specification”, Version 1.0, Jan. 1, 2004, pp. 1-46.

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