Direct conversion RF transceiver for wireless communications

Details Direct conversion RF transceiver for wireless communications Direct conversion RF transceiver for wireless communications

2007-05-01

2007-05-01

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

C375S324000

Reexamination Certificate

active

10052870

ABSTRACT:
A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning the LO frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.

REFERENCES:
patent: 5949830 (1999-09-01), Nakanishi
patent: 6127884 (2000-10-01), Rishi
patent: 6212244 (2001-04-01), Davidovici et al.
patent: 6236848 (2001-05-01), Igarashi et al.
patent: 6370370 (2002-04-01), Roth et al.
patent: 6498927 (2002-12-01), Kang et al.
patent: 6498929 (2002-12-01), Tsurumi et al.
patent: 6560448 (2003-05-01), Baldwin et al.
patent: 6748200 (2004-06-01), Webster et al.
patent: 6862439 (2005-03-01), Feng
patent: 6873832 (2005-03-01), Shi
patent: 2001/0022821 (2001-09-01), Ichihara
patent: 2001/0055350 (2001-12-01), Higure
patent: 2002/0047744 (2002-04-01), Ichihara
patent: 2003/0025623 (2003-02-01), Brueske et al.
patent: 2003/0026361 (2003-02-01), Talwalkar et al.
patent: 2003/0064695 (2003-04-01), Shi

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