| 摘要 |
An electronic music box circuit is provided which includes a pulse generator, a read only memory having address lines to be energized in a predetermined order by the output pulse signals from the pulse generator and memory cells arranged in accordance with a given melody, and a frequency-divider which divides the frequency of the output pulse signal from the pulse generator to produce a plurality of signals with different frequencies. In the read only memory, when one of the address lines is energized, a musical scale signal selection circuit and a signal level selection circuit are energized so that an output signal with a frequency selected from the output signals of the frequency divider is generated from the scale signal selection circuit while at the same time an output signal with a selected signal level is generated from the level selection circuit. The output signals from the scale signal and level signal selection circuits are supplied to a loudspeaker thereby to generate a predetermined sound.
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