标题: 滤波电容、去耦电容、旁路电容有何区别？ [打印本页] 作者: Storm_change 时间: 2022-12-20 16:05 标题: 滤波电容、去耦电容、旁路电容有何区别？ 滤波电容、去耦电容、旁路电容有何区别？8 g4 D, ]% ^/ S- p& D 作者: Griffin 时间: 2022-12-20 16:08
一下给问蒙了，每个芯片电源都用的是0.1UF，都是这么用，也没考虑过。作者: zdf1234 时间: 2022-12-22 09:03
xuexixuexi作者: 超級狗 时间: 2022-12-22 10:56 本帖最后由 超級狗 于 2022-12-22 10:58 编辑 9 X5 s9 ~( I8 O% G3 o- X4 M# i
" U- C$ Y2 K6 F* I8 w1 Y Bypassing is the reduction of high frequency current flow in a high impedance path by shunting that path with a bypass, usually a capacitor (in this case, Cbyp). Bypassing is used to reduce the noise current on power supply lines.( O% E( Z- l' `1 B$ X! S& z. F* m
1 s) T/ y M8 L/ a Decoupling is the isolation of two circuits on a common line. The decoupling network is usually a low pass filter and the isolation is rarely equal in both directions. Decoupling1 Z0 V X2 Z; m: E6 R. q
is used to prevent transmission of noise from one circuit to another. In the figure a bypass capacitor, Cbyp, is shown along with the decoupling circuit, Ldec and Cdec. This is because in practice bypassing is always used when decoupling.' Y4 _! s: A: `! K
; k1 h# x h+ s3 [( c
Most circuits require bypassing, not decoupling. Using decoupling techniques to accomplish bypassing will give disappointing, if not disastrous, results. Complete understanding of both concepts is vital. We begin with bypassing. 5 c" s0 u7 ^) g 0 Q. i; N+ z# [# Q7 D * C7 A, p5 w5 ~ G 5 X, |' S5 t4 c2 `/ Z
