发明名称 |
Interface scanning circuit |
摘要 |
An interface scanning circuit includes a current source at the input to a multiplexer. The current source includes a transistor disposed between two resistors, the second one of which limits reverse current. Also provided are an attenuating network including two resistors, and a low pass filter capacitor associated with the attenuating network.
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申请公布号 |
US5636262(A) |
申请公布日期 |
1997.06.03 |
申请号 |
US19940365959 |
申请日期 |
1994.12.29 |
申请人 |
TELEFONICA DE ESPANA S.A. |
发明人 |
MELIAN, JESUS P. |
分类号 |
H04M1/24;H04M3/30;(IPC1-7):H04M3/22;H04M1/00;H04M3/00;H04M9/00 |
主分类号 |
H04M1/24 |
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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