SYSTEM AND METHODS FOR LOW VOLTAGE SENSING IN PIEZOELECTRIC HAPTICS
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United States of America Patent
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Issued Date -
Oct 10, 2024
app pub date -
Aug 11, 2023
filing date -
Apr 5, 2023
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Abstract
A device includes a high-voltage amplifier to amplify a bursted signal and may couple to a driver circuit to drive a piezoelectric actuator. During the on-time of the bursted signal, a feedback circuit may compensate for non-idealities in the system and may equalize the signal at the actuator and the output of the high-voltage amplifier. During the off-time of the bursted signal, a signal conditioning circuit may sense a difference signal between the signal at the actuator and the signal at the high-voltage amplifier output and may interpret this difference signal as pressure applied to the piezoelectric actuator.
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