发明名称 |
Bandpass filter having low passband phase shift |
摘要 |
An active filter which can achieve extremely high attenuation of frequencies outside the passband while maintaining a very low phase shift of signals within the passband. A preferred embodiment is described in which two, second-order, multiple-feedback, active filter circuits are cascaded and the output of the second filter is fedback to the input of the first filter to realize a fourth-order filter which has very high attenuation of signals falling outside the passband while providing very low phase shifts of signals within the passband.
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申请公布号 |
US4189681(A) |
申请公布日期 |
1980.02.19 |
申请号 |
US19780947256 |
申请日期 |
1978.09.29 |
申请人 |
NEIL BROWN INSTRUMENTS SYSTEMS INC |
发明人 |
BROWN, NEIL L;LAWSON, KENNETH D |
分类号 |
H03H11/12;(IPC1-7):H03F1/34 |
主分类号 |
H03H11/12 |
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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