CONSTANT-CURRENT CHARGE PUMP
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United States of America Patent
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Issued Date -
Jun 4, 2009
app pub date -
Nov 29, 2007
filing date -
Nov 29, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention discloses a constant-current charge pump, wherein a current detection circuit and a regulation circuit are arranged in the output of a pump circuit and used to control the current output by the pump circuit. When the load varies, the current variation is detected, and the regulation circuit pumps and regulates the current output by the pump circuit to stabilize the output current. Thereby, the output current will vary very slightly for different loads and input voltages.
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