发明名称 |
START-UP CIRCUIT FOR NEGATIVE INDUCTANCE MULTIPLIER |
摘要 |
<p>START-UP CIRCUIT FOR NEGATIVE INDUCTANCE MULTIPLIER A circuit for increasing the inductance of a transformer as used in a telephone line circuit. An operational amplifier with appropriate feedback is connected across a separate winding of the transformer to provide the reactive inductance. To compensate for changes in resistance of the winding, a field effect transistor is controlled by the same amplifier output to provide a positive resistance in the feedback path and thus maintain balance. An operational amplifier and diode are arranged to cooperate with the negative inductor to prevent lock-up.</p> |
申请公布号 |
CA1201181(A) |
申请公布日期 |
1986.02.25 |
申请号 |
CA19830435326 |
申请日期 |
1983.08.25 |
申请人 |
GTE AUTOMATIC ELECTRIC INCORPORATED |
发明人 |
BARZEN, THOMAS J. |
分类号 |
H01F27/42;H04M7/04;H04M19/00;(IPC1-7):H03H11/00;H03H11/54 |
主分类号 |
H01F27/42 |
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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