|
|
本帖最后由 超級狗 于 2022-12-22 10:58 编辑 0 ?5 G( d2 l t! H" B2 u. p
7 j# l+ }% P) N4 S2 }
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.
, Y: J# j' a" b
1 x: C6 h5 `+ B/ ]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. Decoupling
8 K/ g, ^* f: D0 L( G* K) L3 ]8 Pis 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.2 {0 |5 @5 P0 K$ M9 g/ ~+ T; S
3 k% `0 j) l; v0 `6 Y6 _
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.
3 |3 K* `; d2 D0 }' I, U
" q3 j3 P8 f, K: r " v+ f9 J9 R) n( A; S0 ]
9 I4 N. j' {! d/ Q+ F) P9 s |
|
/1 
发表于 2022-12-20 16:05
收藏
淘帖
支持！
反对！
发表于 2022-12-22 10:56
