Charge-pump circuitry and a method for high voltage generation with improved PSRR

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United States of America Patent

PATENT NO 11139736
SERIAL NO

17098726

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Abstract

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A high voltage generating circuitry includes a charge-pump and control loop; the control loop includes a voltage divider which receives a high voltage and provides a divided high voltage output. A first circuit element provides a first voltage difference signal. A controller generates a feedback signal based on the first voltage difference signal. An oscillator generates clock signals for operating the charge-pump circuitry, with the frequency of the clock signals being controlled with a control signal. A feedforward path with a second circuit element combines a second reference voltage and a second voltage generated by inverting the supply voltage for obtaining a second voltage difference signal. A third circuit element generates a feedforward compensation signal inversely proportional to a voltage difference between the supply voltage and the second reference voltage. A fourth circuit element generates the control signal by summing the feedback signal and the feedforward compensation signal.

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Patent Owner(s)

  • MURATA MANUFACTURING CO LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aaltonen, Lasse Espoo, FI 19 159

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