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Center tap level control for current mode differential driver

  • US 6,603,348 B1
  • Filed: 04/18/2002
  • Issued: 08/05/2003
  • Est. Priority Date: 04/18/2002
  • Status: Expired due to Fees
First Claim
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1. A stabilized current mode differential driver, comprising:

  • (a) a pfet current source;

    (b) an nfet current source;

    (c) a current steering network connected to the pfet current source and the nfet current source;

    (d) a center tap terminator connected to the current steering network;

    (e) a feedback network connected to the center tap terminator to provide feedback to the pfet current source and the nfet current source to maintain a constant average common mode voltage, the feedback network comprising;

    (i) a first feedback resistor connected to a gate of the pfet current source; and

    (ii) a second feedback resistor connected to a gate of the nfet current source.

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