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Ring oscillator

  • US 10,003,326 B1
  • Filed: 01/05/2018
  • Issued: 06/19/2018
  • Est. Priority Date: 05/15/2017
  • Status: Active Grant
First Claim
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1. A ring oscillator, comprising:

  • a first inverter, wherein the first inverter has an input terminal for receiving an output signal, and an output terminal for outputting a first signal at a first node;

    a second inverter, wherein the second inverter has an input terminal for receiving the first signal, and an output terminal for outputting a second signal at a second node;

    a third inverter, wherein the third inverter has an input terminal for receiving the second signal, and an output terminal for outputting the output signal at an output node of the ring oscillator;

    a first amplifier, amplifying the output signal by a gain factor so as to generate a first amplified signal;

    a second amplifier, amplifying the first signal by the gain factor so as to generate a second amplified signal;

    a third amplifier, amplifying the second signal by the gain factor so as to generate a third amplified signal;

    a first capacitor, wherein the first capacitor has a first terminal coupled to the first node, and a second terminal for receiving the third amplified signal;

    a second capacitor, wherein the second capacitor has a first terminal coupled to the second node, and a second terminal for receiving the first amplified signal; and

    a third capacitor, wherein the third capacitor has a first terminal coupled to the output node, and a second terminal for receiving the second amplified signal.

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