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Low power buffer with gain boost

  • US 10,110,204 B2
  • Filed: 03/31/2017
  • Issued: 10/23/2018
  • Est. Priority Date: 02/04/2015
  • Status: Active Grant
First Claim
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1. A communication system having circuitry for gain boost of an output signal, the communication system comprising:

  • at least one communication receiver having an analog-to-digital converter comprising a buffer circuit; and

    an output node connected to the buffer circuit that drives the output signal to the output node, wherein the buffer circuit comprises;

    a current mirror connected to a first supply node, the current mirror to produce a current feedback signal, wherein the current mirror provides a feedback path through the current feedback signal to improve symmetry between positive and negative slewing current at the output signal;

    a first transistor coupled to a first input voltage to form a first input signal;

    a second transistor coupled to the first input signal and coupled to a second input voltage, the second input voltage being a complement of the first input voltage;

    a first bias circuit being coupled to the second transistor and being coupled to a bias voltage; and

    a second bias circuit being coupled to the bias voltage, and being coupled to the current feedback signal through at least one transistor.

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