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Proximity detection using a hybrid transceiver

  • US 10,651,957 B2
  • Filed: 05/06/2019
  • Issued: 05/12/2020
  • Est. Priority Date: 03/28/2018
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a local oscillator;

    a transmitter comprising an upconversion mixer, an input of the upconversion mixer coupled to the local oscillator;

    a receiver comprising a downconversion mixer; and

    downconversion reference selection circuitry comprising;

    a first input node coupled to an output of the upconversion mixer;

    a second input node coupled to the local oscillator; and

    a first output node coupled to an input of the downconversion mixer,the downconversion reference selection circuitry configured to selectively;

    connect the first input node to the first output node; and

    connect the second input node to the first output node.

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