发明名称 |
Circuit arrangement for the cradle switch of a telephone terminal |
摘要 |
In the existing circuit arrangement, the cradle switch contact consists of a transistor establishing the loop closure. The switching path of this transistor is driven to low impedance when, due to the removal of the handset, a membrane contact opens and as a result the control circuit of this transistor is influenced.
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申请公布号 |
DE3623017(A1) |
申请公布日期 |
1988.01.14 |
申请号 |
DE19863623017 |
申请日期 |
1986.07.09 |
申请人 |
TELENORMA TELEFONBAU UND NORMALZEIT GMBH |
发明人 |
LANGE,HEINZ;VOGT,WALTER;POENITZ,GERD |
分类号 |
H04M1/60;H04M1/82;(IPC1-7):H04M1/08 |
主分类号 |
H04M1/60 |
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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