標題: an interview question [打印本頁] 作者: taofeng 時間: 2009-5-5 01:22 AM 標題: an interview question hi, 1 R; Z) _4 u. Z. \1 C9 S* R attached is an interview question ! interesting reader can have a look and discuss it. , Z$ x) t8 b3 X+ a/ O, O C , _: O; T) @1 bregards,# [* w7 A; k1 U. H/ k
8 D% G+ X" \9 {; ~ N4 N& e- cjef作者: cirand 時間: 2009-5-5 09:04 AM
Vbe=0.7, 流过base的电流很小，可以忽略，故而Vce=0.7X10/7=1V作者: taofeng 時間: 2009-5-5 03:14 PM
what if Ibase is not so small ?? & b$ ~ E; c7 I* ? d/ w" C8 S( Z , Q1 ?0 r# W7 F2 _6 s' K; s# Zregards,作者: jesseyu 時間: 2009-5-6 04:23 PM
I's not like that, the VBE is not necessarily 0.7V in such configuration. ICE=(0.7VCE/Rb)*Beta, then IR=I-ICE. Just my opinion作者: kukyxu 時間: 2009-5-14 08:47 AM
Vbe=0.7, 流过base的电流很小，可以忽略，故而Vce=0.7X10/7=1V* s, z8 I" q, R' K* s" U/ F
kankan la作者: kj.guo 時間: 2009-5-15 09:33 PM
这是一个self bias 的结构，通常Ib可以忽略，Vbe=0.7v，所以Vce=1v