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Charge-based phase locked loop charge pump

  • US 8,525,564 B2
  • Filed: 10/20/2011
  • Issued: 09/03/2013
  • Est. Priority Date: 10/20/2010
  • Status: Active Grant
First Claim
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1. A charge-based charge pump comprising:

  • a switchable capacitor configured for connection to a voltage source, a ground, and a charge pump output;

    a first pair of switches including a first switch configured to connect the switchable capacitor to ground and a second switch configured to connect the switchable capacitor to the voltage source; and

    a second pair of switches including a third switch configured to connect a first node, between the switchable capacitor and ground, to the charge pump output, and a fourth switch configured to connect a second node, between the switchable capacitor and the voltage source, to the charge pump output.

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