发明名称 |
Lowpass filter with electronic control of cutoff and resonance |
摘要 |
A lowpass filter circuit having an electronically controllable cutoff frequency and utilizing a feedback current mirror circuit as a variable impedance element. The filter circuit employs low noise, low distortion output circuitry and includes means for electronically controlling resonance.
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申请公布号 |
US4404529(A) |
申请公布日期 |
1983.09.13 |
申请号 |
US19800221299 |
申请日期 |
1980.12.30 |
申请人 |
ROSSUM, DAVID P.;DOW, RONALD N. |
发明人 |
ROSSUM, DAVID P.;DOW, RONALD N. |
分类号 |
H03G5/00;H03H11/12;(IPC1-7):H03G5/22 |
主分类号 |
H03G5/00 |
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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