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Poly-phase network with resonant circuit bandpass shaping

  • US 6,836,180 B1
  • Filed: 06/23/2003
  • Issued: 12/28/2004
  • Est. Priority Date: 06/23/2003
  • Status: Active Grant
First Claim
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1. A polyphase device comprising:

  • a first transistor having a first collector, a first base and a first emitter, the first base adapted to receive a positive portion of an input signal;

    a second transistor having a second collector, a second base and a second emitter, the second base adapted to receive a negative portion of the input signal, the first transistor and the second transistor adapted to drive the R-C polyphase network;

    an R-C polyphase network having a first input coupled to the first collector and a second input coupled to the second collector;

    the R-C polyphase network including an inductor;

    the R-C polyphase network having first output and a second output, the first output and the second output offset in phase; and

    the R-C polyphase network including the inductor adapted to provide bandpass filtering of the first output and the second output;

    wherein the first output and the second output are offset in phase by approximately 90 degrees.

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