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Replica Cascode Bias Voltage-Controlled Oscillators

  • US 20170149437A1
  • Filed: 05/12/2015
  • Published: 05/25/2017
  • Est. Priority Date: 05/12/2015
  • Status: Active Grant
First Claim
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1. A voltage oscillator comprising:

  • a voltage-to-current converter configured to generate a control current responsive to receiving a control voltage, the voltage-to-current converter comprising a first transistor and a second transistor, a drain of the first transistor coupled to a source of the second transistor and a gate of the second transistor biased by a bias voltage;

    a current controlled oscillator coupled to the voltage-to-current converter to receive the control current and to generate a periodic output signal having a frequency corresponding to the control current; and

    a bias voltage generation circuit coupled to the voltage-to-current converter, the bias voltage generation circuit comprising a replica bias circuit configured to generate a replica voltage corresponding to a voltage at the source of the second transistor.

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