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Charge pump circuits

  • US 5,978,283 A
  • Filed: 07/02/1998
  • Issued: 11/02/1999
  • Est. Priority Date: 07/02/1998
  • Status: Expired due to Fees
First Claim
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1. A charge pump circuit comprising:

  • two pulse train inputs providing two non-overlapping pulse train signals;

    a first group of N series-coupled pump stages having at least two pump stages, each pump stage of said first group including a MOS device, a node and a pump capacitor having a first end connected to said node and a second end connected to one of said pulse train inputs, wherein adjacent pump stages have pump capacitors connecting to different pulse train inputs; and

    a second group of series-coupled pump stages series-coupled to said first group, each pump stage of said second group including a MOS device, a node and a pump capacitor having a first end connected to said node and a second end connected to the node of a preceding pump stage that is N stage away in said charge pump circuit, said second group having at least one pump stage.

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