Five-port topology for direct down-conversion

Details Five-port topology for direct down-conversion Five-port topology for direct down-conversion

2006-08-15

2006-08-15

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency conversion between signal source and receiver

C455S136000, C455S189100, C455S190100, C455S318000, C332S138000, C329S302000, C329S306000

Reexamination Certificate

active

07092687

ABSTRACT:
An apparatus for a direct down-conversion of modulated RF signals, the device including: a first power detector connected between an input port for the modulated RF signal and ground, which outputs a first DC signal, a second power detector connected between an input port for a local oscillator signal and ground, which outputs a second DC signal, the local oscillator signal having the same center frequency as the modulated RF signal, and a third power detector connected between the input port for the modulated RF signal and the input port for the local oscillator signal, which outputs a third DC signal.

REFERENCES:
patent: 5498969 (1996-03-01), Huyart et al.
patent: 5940750 (1999-08-01), Wang
patent: 6600913 (2003-07-01), Brankovic et al.
patent: 6650178 (2003-11-01), Brankovic et al.
patent: 2002/0131480 (2002-09-01), Sousa et al.
patent: WO 99 33166 (1999-07-01), None

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