Current Sensing Resistor Trimming!!

mt7344

目前需要依個相當準確的 10Ohm (絕對值) 電阻做 current sensing 用，
1 c8 D5 T9 _# M# f* @+ @但在半導體內要做到絕對值0.5%內是相當困難的。
# C/ {8 N( N1 W4 f+ h是否有方法可以得到精準的絕對值電阻!!
% a1 Z2 K+ R+ D* m目前想要用 trimming 的方法? 可否有人幫忙解答?

0 p& u: L' e3 R但是  還沒有想到要如何 trimming?  苦惱唷!!
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感激唷!!

! c2 T$ I/ g/ y; N) U( T8 u以下是 Fuse & Trim  的相關討論:
; t: [  u; e/ R& ^poly fuse 的問題
e-fuse?  
poly fuse 大約多少能量便可以燒斷?
如何判断poly fuse 已经blown  
2 J, m9 |- h% H有關poly FUSE的不錯paper給大家參考  
Laser Trim
6 ]5 J4 B* `- e3 Z+ w, b做完laser trim後內部的電路被打傷的情況嗎？  
Trimming method?   
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( w- M0 M- B5 ]3 U9 {; U请教做laser trim的注意事项  
Current trimming 要如何做呢?  

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[ 本帖最後由 sjhor 於 2009-3-17 06:38 PM 編輯 ]

wuwen

Before we look for trimming, let us review the following:
% b' E+ Q0 M* a2 d7 B% V  v' t1. What is the technology used here
0 [/ [* [+ {- V9 H% n; T( q8 Q9 n5 k2. What type of resistors you have
; {# L% ~2 {( U/ ?) N# I3. What is the sheet resistance/ area
8 M# k/ U# }7 g4. What are the fluctuation of these resistances over corners and temperature
5. How much area you have

" X. Y7 X7 S* @: X+ w' h3 pNot quite sure one would have a pragmatic solution here.

Hopefully these help.

stanley547

感謝大大分享  努力學習中

staric

好难呀。。。。。。。。。。。。。

AIC6632

這要ＴＲＩＭ到這個精準度
/ h6 m3 Y5 x6 O& _3 H) T還真的很難耶