| 发明名称 |
PILOT SIGNAL DETECTION CIRCUT |
| 摘要 |
PURPOSE:To make detectable whether the communication line is in non-communication or not as the DC signal level depending on the pilot signal level, by inverting the PCM code of the communication line for the polarity every other sampling and by converting it into the linear natural binary code. |
| 申请公布号 |
JPS5398714(A) |
申请公布日期 |
1978.08.29 |
| 申请号 |
JP19770013824 |
申请日期 |
1977.02.09 |
| 申请人 |
NIPPON ELECTRIC CO;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
TANAKA SUSUMU;YAMAMOTO MORIYUKI;FUKINUKI YOUJI |
| 分类号 |
H03M1/10;C08J9/30;H04B17/00;H04J3/14 |
主分类号 |
H03M1/10 |
| 代理机构 |
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