MICROPHONE MICROCHIP DEVICE WITH INTERNAL NOISE SUPPRESSION

摘要

A microphone microchip for a voice communication device. The microchip receives and processes an audio signal from a microphone. The microchip incorporates an RF filter that substantially attenuates noise signals at RF frequencies, while passing audio signals, substantially unattenuated. The filter is inserted between ports through which RF carrier signal noise can enter the microchip and internal elements of the microchip that provide a nonlinear response. Thus, modulated RF carrier noise is attenuated before this noise can interact with the nonlinear elements to convert the modulated carrier noise to audible interference. Corruption of microphone signals is thereby avoided.