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High speed controller area network receiver having improved EMI immunity

  • US 7,567,105 B2
  • Filed: 12/23/2005
  • Issued: 07/28/2009
  • Est. Priority Date: 12/28/2004
  • Status: Active Grant
First Claim
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1. A Controller Area Network (CAN) receiver comprising:

  • a voltage divider coupleable to a controller area network bus for dividing a signal on the bus by a predetermined factor N to generate an input signal;

    a front end amplifier coupled to the voltage divider for receiving the input signal, the front end amplifier amplifying the input signal by a predetermined factor substantially equal to 1/N; and

    a reference generator coupled to the front end amplifier to receive a common-mode voltage of the front end amplifier, the reference generator generating a voltage reference output signal equivalent to the front end amplifier common-mode voltage subtracted by a bandgap reference voltage wherein the bandgap reference voltage has a first value and a second value.

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