Gain boosting for local oscillation distribution circuitry

Details Gain boosting for local oscillation distribution circuitry Gain boosting for local oscillation distribution circuitry

2005-11-21

2008-08-19

Vuong, Quochien B (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S127100, C455S232100, C455S333000, C330S252000

Reexamination Certificate

active

07415286

ABSTRACT:
A multi-band integrated circuit radio transceiver comprising receive and transmit radio front end circuit blocks further includes a local oscillation generator for generating a local oscillation for use by the receive and transmit radio front end circuit blocks to down convert received RF signals to baseband or low intermediate frequency signals and for use by the transmit front end circuit blocks to up-convert outgoing communication signals to RF, respectively. The transceiver further includes at least one buffering element coupled disposed in the local oscillation path that produces a buffered oscillation based upon the local oscillation to at least one front end circuit block wherein the buffering element includes a differentially arranged amplifier stage having a load and a cross-coupled capacitive element coupled between input and output nodes of the amplifier stage and at least one of an inductive device or a selectable capacitive device.

REFERENCES:
patent: 4291246 (1981-09-01), Martino et al.
patent: 6414517 (2002-07-01), Kim et al.
patent: 7015870 (2006-03-01), Guitton et al.
patent: 2002/0049046 (2002-04-01), Audinot
patent: 2005/0124377 (2005-06-01), Shih et al.

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