Methods and systems for down-converting electromagnetic signals, and applications thereof

  • US 20050202797A1
  • Filed: 12/27/2004
  • Published: 09/15/2005
  • Est. Priority Date: 10/21/1998
  • Status: Active Grant
First Claim
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1. A circuit for frequency down-converting an in-phase/quadrature-phase (I/Q) signal, comprising:

  • a first universal frequency translation module accepting the I/Q signal;

    a second universal frequency translation module accepting the I/Q signal; and

    a splitter circuit accepting a local oscillating signal, wherein said splitter circuit comprises;

    a first inverter circuit comprising one or more inverters;

    a second inverter circuit comprising two or more inverters;

    a first flip-flop electrically coupled to said first inverter circuit; and

    a second flip-flop electrically coupled to said second inverter circuit, wherein said first inverter circuit receives said local oscillating signal and said first flip-flop outputs an “

    I-channel”

    oscillating signal, said second inverter circuit receives said local oscillating signal and said second flip-flop outputs a “

    Q-channel”

    oscillating signal, wherein said “

    I-channel”

    oscillating signal is electrically coupled to said first universal frequency translation module, and said “

    Q-channel”

    oscillating signal is electrically coupled to said second universal frequency translation module, thereby causing said first universal frequency translation module to output the down-converted “

    I”

    signal, and said second universal frequency translation module to output the down-converted “

    Q”

    signal.

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