发明名称 |
Carrier control method by using phase-pulse signals |
摘要 |
A carrier control method using phase-pulse signals in which a plurality of terminal-selection channels and a plurality of returning channels having a predetermined phase width respectively are provided in one cycle of an alternating current carrier wave. At the center, a terminal-selection phase-pulse signal comprising a combination of existence and non-existence of a phase pulse for each terminal-selection channel is injected in the terminal-selection channels, corresponding to a code assigned to each terminal equipment. At the terminal equipment, the terminal-selection phase-pulse signal is received. When the code of the signal coincides with the code of the terminal equipment, a returning phase-pulse signal comprising a combination of existence and non-existence of a phase pulse for each returning channel is injected in the returning channels, corresponding to a datum stored at the terminal in the electrically readable state, and the signal is received at the center.
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申请公布号 |
US4179624(A) |
申请公布日期 |
1979.12.18 |
申请号 |
US19770840369 |
申请日期 |
1977.10.07 |
申请人 |
OSAKI ELECTRIC CO LTD;TOKYO ELECTRIC POWER CO INC |
发明人 |
ENDO, MASAYASU;KIMIJIMA, TAKAHIRO;ONISHI, HIROYASU;SHINDO, YOSHIO |
分类号 |
H04B3/54;G01R21/00;G08C15/00;G08C15/06;G08C19/00;G08C19/06;H02J13/00;H04J3/00;H04J3/24;(IPC1-7):G08C19/24 |
主分类号 |
H04B3/54 |
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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