標題: about GBP & unit gain bandwidth question.... [打印本頁] 作者: super 時間: 2007-7-23 06:06 PM 標題: about GBP & unit gain bandwidth question.... Dear all: - R( U+ k9 `7 p( L+ @7 yI see the data sheet, OP Gain Bandwidth product is 140Mhz, Unit gain bandwidth is 40Mhz. 9 S1 F( x/ v" _& j; J7 yIn my concept Gain bandwidth product should be equal to Unit gain bandwidth, 3 s e3 i" s& C4 iwhy in this data sheet is not equal ? ' ]- [# r4 n0 x3 k0 m! X; t. I, N" ]" \0 Z. @5 U
thanks.作者: adele 時間: 2007-7-23 06:20 PM 標題: 回復 #1 super 的帖子 定义6 m5 A( V% a4 a3 l6 {, J3 F
unit gain bandwidth:增益下降为1时的频率；! k. g$ S- s ~2 V6 x' A/ M
gain bandwidth product:（dc gain - 3dB)* 对应的频率值（dc gain下降3dB处）。 7 B$ O7 Z* w+ U1 l, F6 S不太懂conditions那栏里面所写的。作者: super 時間: 2007-7-24 09:39 AM
因為我也有去看其他家的datasheet 有 些也是這樣寫的 ..; i3 {: F; V, B1 G$ l. F* L, X5 y7 ^# D
不管如何還是謝謝大大囉 ...* r# a9 ]' L& h
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還有人知道為什麼嗎 ?