发明名称 |
Digital tone generator for tone sequences |
摘要 |
Semiconductor circuits for the automatic generation of tone sequences of different tones. A bistable switch having a control input activated by start signal controls a voltage stabilizing circuit which in turn controls an RC-oscillator. Several frequency dividers are driven by the oscillator for producing divider outputs as tone signal outputs furnishing individual tone frequencies corresponding to the tone sequences to be produced. A general cycle control has inputs controlled by the first divider output. Modulator modules driven by the cycle control and by the tone signal outputs, are connected to the digital-to-analog converters which produce tone signal outputs that correspond to the individual tone frequencies. The digital-to-analog converters have outputs that are jointly connected to an electro-acoustic transducer, such as a loudspeaker.
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申请公布号 |
US4516113(A) |
申请公布日期 |
1985.05.07 |
申请号 |
US19810313253 |
申请日期 |
1981.10.21 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
SCHECKEL, BRUNO;WITTENZELLNER, ERNST |
分类号 |
G10H5/00;B06B1/02;G10H1/26;G10K15/04;(IPC1-7):H03K5/156;G08B3/00 |
主分类号 |
G10H5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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