| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital control electroacoustic transducer that outputs a digital signal, without converting digital data into an analog signal. SOLUTION: A full bit clock is generated in a word clock of digital data, and preset digital data and bit clock are compared in a conversion period of the word clock to set a required time is a pulse output. A digital signal is given to a digital input and an analog signal is given to an A/D converter, a voltage or current amplifier section 2 arranges the outputs and a sound output is obtained from an electroacoustic transducer element 4 through a pulse amplifier 3. The pulse amplifier 3 decides on an output through a voltage, a current and a combination of components of an output setting power supply section (variable) (d) or the acoustic output element 4 through the general A/D converter 1 and a digital signal decoder and an interface 2 to transfer a signal to the pulse amplifier section.
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