CHARGE PUMP WITH REDUCED CURRENT CONSUMPTION
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United States of America Patent
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Issued Date -
May 28, 2015
app pub date -
Nov 22, 2013
filing date -
Nov 22, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The output voltage of a LP HV charge pump is compared with a voltage reference using a comparator having hysteresis. When the output voltage exceeds the reference voltage, an input clock to the charge pump is turned off, causing the output voltage to fall due to leakage current in the non-volatile memory. After a time delay due to the hysteresis of the comparator, the input clock is turned on, causing the output voltage to rise again until the voltage reference is again exceeded at which time the input clock is again turned off again. The process repeats, resulting in a reduction of average current consumption by the LP HV charge pump.
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