Direct conversion receiver apparatus

Details Direct conversion receiver apparatus Direct conversion receiver apparatus

2005-04-19

2005-04-19

Kincaid, Lester G. (Department: 2687)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S076000, C455S209000, C455S314000

Reexamination Certificate

active

06882834

ABSTRACT:
A direct conversion receiver apparatus includes a local oscillator to produce a first local oscillation signal and a second oscillation signal. A first modulation circuit modulates the first local oscillation signal, and a second modulation circuit modulates the second local oscillation signal. A RF mixer mixes a received radio frequency signal with the modulated first local oscillation signal, and another RF mixer mixes the received radio frequency signal with the modulated second local oscillation signal. Demodulating circuits translate desired signals of the mixed signal from the RF mixers into band and translate undesired signals of the mixed signal out of band. Filters remove the undesired signals from the demodulated signals.

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