High voltage generation using low voltage devices
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United States of America Patent
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May 9, 2017
Grant Date -
Feb 2, 2017
app pub date -
Jul 28, 2015
filing date -
Jul 28, 2015
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Abstract
A charge pump design suitable for generating high voltages employs multiple low voltage capacitors and low voltage transfer switches, with a limited number of high voltage devices. This is designed such that during a first clock phase, capacitors are each connected between an input voltage and ground and, during a second clock phase all the capacitors are connected in series to generate the required voltage. Both the switches (PMOS) and as well the capacitors are realized as low voltage devices. The ability to use low voltage devices can significantly reduce the area and also a reduction in current consumption relative to the usual high voltage charge pumps which uses high voltage devices.
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