×

Switched capacitor array circuit for use in DC-DC converter and method

  • US 6,563,235 B1
  • Filed: 10/03/2000
  • Issued: 05/13/2003
  • Est. Priority Date: 10/03/2000
  • Status: Active Grant
First Claim
Patent Images

1. A capacitor array circuit connected to an input node, an output node and a third node, said capacitor array circuit comprising:

  • first and second capacitors, with each capacitor having first and second terminals;

    switching circuitry coupled to the first and second capacitors and to the input, output and third node;

    control circuitry coupled to the switching circuitry and operative to sequentially switch the array circuit through at least three different states so that a voltage developed across each of the first and second capacitors is a fixed proportion of a voltage at the input, node, so that the array circuit has a fixed gain when switched through the at least three different states, so that at least one of the first and second capacitors is connected intermediate two of the input, output and third nodes in each of the three states and so that each of the first and second capacitors has a connection relative to the input, output and third node which changes in at least one of the three states and wherein in at least one of the at least three different states, none of the first and second capacitors is connected between the input and output nodes.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×