Patent ID: 10429906

Abstract:
A motion-detection-circuit configured to receive an audio-output-signal and a received-motion-signal. The motion-detection-circuit includes a preliminary-motion-detector configured to process the received-motion-signal in order to set a state of a prelim-motion-detected-signal based on the received-motion-signal; and an ADC for providing an ADC-output-signal that is a digital representation of a signal received at an ADC-input-terminal. The motion-detection-circuit also includes a switch configured to connect either (i) an audio-output-receiver or (ii) a motion-signal-receiver-terminal to the ADC-input-terminal based on the state of the prelim-motion-detected-signal. The motion-detection-circuit further includes a digital-motion-detector configured to, based on the state of the prelim-motion-detected-signal, process the ADC-output-signal in order to set a state of a motion-detection-signal; and a digital-audio-processor configured to, based on the state of the prelim-motion-detected-signal, process the ADC-output-signal in order to provide an audio-input-signal for an audio-output-module.