发明名称 |
SUITSUCHIKAIRO |
摘要 |
<p>In a switching circuit for use in a mobile telephone device in controllably transmitting a speech signal to a radio transmission unit through an output terminal (312), a first switch (31) is controlled by a control signal which is supplied to a control terminal (32) with a high level and a low level of putting the first switch in a conductive and a non-conductive state when a second switch (36) is put in its off and on states. A capacitor (35) is connected between the control terminal and the output terminal in order to make the switching circuit have a low output impedance when the first switch is put in its off state. <IMAGE></p> |
申请公布号 |
JP2655622(B2) |
申请公布日期 |
1997.09.24 |
申请号 |
JP19900410997 |
申请日期 |
1990.12.14 |
申请人 |
NIPPON DENKI KK;SAITAMA NIPPON DENKI KK |
发明人 |
TOMII YUTAKA;TAKENAKA HIDETOSHI |
分类号 |
H04M11/00;H04M1/00;H04M1/06;H04M1/725;H04W52/02;(IPC1-7):H04M11/00 |
主分类号 |
H04M11/00 |
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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