巴特沃斯4阶带通滤波器设计说明
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
FileID: E:\Program Files\FWP3230\Designs\bpf.fp3
Passband bandwidth: 10 Hz Center frequency: 50 Hz
FileID: E:\Program Files\FWP3230\Designs\bpf.fp3
Passband bandwidth: 10 Hz Center frequency: 50 Hz
Adjusting the stage parameters:
By magnitude:
fc
(1) Determine maximum gain in passband (theoretical gain = 1.000).
(2) Adjust for 40dB attenuation at 0.01* f c and 100* f c (theoretical gain = 0.010).
(3) Repeat (1) and (2) if required.
(4) For high Q stages, simply tune on peak.
Qp
Adjust Qp for 3dB attenuation (theoretical gain = 0.707) at 39.382 Hz and
49.915 Hz.
By phase (preferred method):
fc
Adjust for a 180º phase shift at fc.
Qp
Adjust for a -135º phase shift at 39.382 Hz and a +135º phase shift at
49.915 Hz.
FileID: E:\Program Files\FWP3230\Designs\bpf.fp3
Adjusting the stage parameters:
By magnitude:
fc
(1) Determine maximum gain in passband (theoretical gain = 2.029).
(2) Adjust for 40dB attenuation at 0.01* f c and 100* f c (theoretical gain = 0.020).
(3) Repeat (1) and (2) if required.
(4) For high Q stages, simply tune on peak.
Qp
Adjust Qp for 3dB attenuation (theoretical gain = 1.435) at 50.085 Hz and
63.48 Hz.
By phase (preferred method):
fc
Adjust for a 180º phase shift at fc.
Qp
Adjust for a -135º phase shift at 50.085 Hz and a +135º phase shift at 63.48 Hz.
FileID: E:\Program Files\FWP3230\Designs\bpf.fp3