Adjusting resonant frequencies based on feedback networks

Abstract

An electronic device comprises a sensor comprising first and second electrodes, with the sensor being configured for a first acoustic displacement due to input acoustic pressure; circuitry configured to measure a charge between the first and second electrodes due to the input acoustic pressure and to apply a voltage to cause a second acoustic displacement of the sensor that is out of phase with the first acoustic displacement, with the applied voltage further causing a charge to develop across the sensor, and with the first and second acoustic displacements causing an increase in damping in a resonance frequency of the sensor, relative to damping of the resonance frequency of the sensor prior to applying the voltage; and a passive electronic component configured to cancel out the charge developed across the sensor due to the applied voltage.

Dependencies are inferred from the claim text.