发明名称 |
Negative inductance multiplier circuit including temperature compensation |
摘要 |
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.
|
申请公布号 |
US4463307(A) |
申请公布日期 |
1984.07.31 |
申请号 |
US19820436874 |
申请日期 |
1982.10.26 |
申请人 |
GTE AUTOMATIC ELECTRIC INC. |
发明人 |
KIKO, FREDERICK J.;BARZEN, THOMAS J. |
分类号 |
H01F27/42;H04M19/00;(IPC1-7):H01F27/42;H01F40/14 |
主分类号 |
H01F27/42 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|