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最近在看Filter相關書籍
4 L X- u1 N1 E9 ]1 t) u+ Y書中提到
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% x/ r' z* B& }/ c( w. q1 eThe time for the step response to reach the value 0.5 is an approximate measure of the average group delay
( e! L& Z! Q8 c4 Y- E, s) R. Wand ringing in the step response indicates that the group delay varies strongly in the passband
! G2 R% {9 M' P0 t9 e4 v想請問為何從step response中就可以知道關於group delay0 J1 m+ s+ u- q V
有什麼相關數學公式來驗證這些關係嗎: ~, r0 [& [7 e6 _
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voltage mode and current mode7 t5 a* n6 j/ J8 d+ v3 Y5 g
為何voltge mode較不適用在高頻阿& U4 Z, ~- F0 m9 L% a
書中是說voltage mode 用 feedback
9 }) l" G+ E V. _7 V4 }所以較不適用在高頻
, m/ V) [; A2 x, |; Q但是用回授
9 r* j' f5 d! I不是頻寬增加!?: }; U+ C( l; H# W3 D# @# C
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想請教版上各位大大這兩個問題
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( l. s9 e0 W0 M; e9 n感謝 |
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