Patent ID: 8885849

Claim:
A component having a micromechanical microphone structure, comprising: an acoustically active diaphragm which functions as a deflectable electrode of a microphone capacitor, a stationary acoustically permeable counterelement which functions as a counter electrode of the microphone capacitor, a detecting arrangement to detect and evaluate the changes in capacitance of the microphone capacitor; an applying arrangement to apply a high-frequency clock signal to the microphone capacitor and for applying the inverted clock signal to an adjustable but acoustically inactive compensation capacitor, an integrating operational amplifier which integrates the sum of the current flow through the microphone capacitor and the current flow through the compensation capacitor, a demodulator for the output signal of the integrating operational amplifier, the demodulator being synchronized with the clock signal, and a low-pass filter for obtaining a microphone signal, which corresponds to the changes in capacitance of the microphone capacitor, from the output signal of the demodulator.