Voltage generators and systems
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United States of America Patent
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Nov 6, 2018
Grant Date -
Apr 26, 2018
app pub date -
Dec 20, 2017
filing date -
Jul 21, 2015
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Abstract
In one example, a voltage generator includes a plurality of voltage pumps, a voltage detection circuit, an oscillator, and a control circuit. The plurality of voltage pumps are configured to perform voltage pumping operations in a sequence and output a pumping voltage. The voltage detection circuit is configured to detect a voltage level of the pumping voltage and output a detection signal. The control circuit is configured to output, in response to the detection signal, a plurality of divided oscillator signals based on an oscillator signal of the oscillator, to enable a different one of the voltage pumps to begin each sequence of voltage pumping operations each time the pumping voltage is less than a threshold voltage.
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