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Switched capacitor circuit having voltage management and method

  • US 6,169,673 B1
  • Filed: 01/27/1999
  • Issued: 01/02/2001
  • Est. Priority Date: 01/27/1999
  • Status: Expired due to Term
First Claim
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1. A switched capacitor circuit comprising:

  • a first capacitor having first and second terminals;

    a plurality of transistor switches connected to the first and second terminals of the first capacitor; and

    drive circuitry for controlling a state of the transistor switches, with the drive circuitry alternating between a first phase where the capacitor is connected by the switches in series between an input node and an output node and a second phase where the capacitor is connected in series between one of the input and output nodes and a third node, with a first current path being defined between the capacitor and the input node in the first phase having a resistance selected to be at least twice a resistance of a second current path defined between the capacitor and the output node in the first phase.

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