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Noise canceler for use in a transceiver

  • US 9,450,623 B2
  • Filed: 09/19/2014
  • Issued: 09/20/2016
  • Est. Priority Date: 09/19/2014
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a split amplifier to amplify a transmit signal in a transmit band and attenuate noise in a receive band to produce an amplified transmit signal, the split amplifier comprising a driver amplifier to amplify the transmit signal to generate an amplified first signal, a first filter to filter the amplified first signal to attenuate signals in the receive band to provide a filtered amplified first signal, and a power amplifier to amplify the filtered amplified first signal to generate the amplified transmit signal; and

    a feedback circuit coupled to the split amplifier to filter the amplified transmit signal to attenuate the transmit signal in the transmit band to produce a detection signal, the detection signal to be subtracted from a received signal to reduce noise in the receive band.

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