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SUPPLY REGULATED VOLTAGE CONTROLLED OSCILLATOR INCLUDING ACTIVE LOOP FILTER AND PHASE LOCKED LOOP USING THE SAME

  • US 20140085011A1
  • Filed: 06/25/2013
  • Published: 03/27/2014
  • Est. Priority Date: 09/26/2012
  • Status: Active Grant
First Claim
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1. A supply regulated voltage controlled oscillator including an operational amplifier used as a supply regulator and a supply controlled oscillator, the supply regulated voltage controlled oscillator comprising:

  • a negative feedback circuit feeding an output signal of the operational amplifier back to an inverting input terminal of the operational amplifier,wherein the negative feedback circuit has a loop filter constituted by passive elements as to serve as an active loop filter, and whereby the supply regulated voltage controlled oscillator has an active loop filter function.

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