发明名称 |
Touch tone decoder |
摘要 |
A programmable tone decoder for standard bell system DTMF tone pairs is presented which comprises an integrated DTMF receiver and a means for programming a sequence of digits which are compared to the output of the DTMF receiver. The decoding means provides an output for an exact comparison of the complete sequence, the output being indicative of the reception of a proper telephone code sequence.
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申请公布号 |
US4602131(A) |
申请公布日期 |
1986.07.22 |
申请号 |
US19850697464 |
申请日期 |
1985.02.01 |
申请人 |
MIDIAN ELECTRONICS, INC. |
发明人 |
SOULLIARD, CHARLES;KELLY, KEVIN;LEHMAN, PHILIP |
分类号 |
H04Q1/457;(IPC1-7):G06F15/31 |
主分类号 |
H04Q1/457 |
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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