| 摘要 |
PURPOSE: A voice recognition clock is provided to report current time automatically in response to the voice of the user by having voice recognition function and voice synthesis function. CONSTITUTION: The MIC(2) transforms the voice to the electric signal. The PRE-AMP(3) amplifies the electric signal to predetermined level. The LPF(5) separates the audio frequency from the electric signal. The A/D converter(9) converts the analog signal to digital signal. The D1(10) compares the digital signal with reference signal and outputs the corresponding signal to the CPU(1). The ROM(20) outputs the digital signal corresponding to 7 segment data and time data. The D/A converter(21) converts the digital signal from the ROM(20) to analog signal.
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