Slide 55
Slide 55 text
反転増幅回路の増幅度
• 𝑅*
に加わる電圧𝑉-,
はイマジナリショートより
• 𝑉&!
= 𝑉)
• 𝑅*
を流れる電流𝐼-,
はオームの法則𝑉# = 𝑅*𝐼-,
より
• 𝐼-,
= .-,
-,
= ..
-,
• ⼊⼒端⼦には電流は⼊っていかないため,それぞれの抵抗を流れる電
流𝐼-,
と𝐼-+
は等しい.よって
• 𝐼-,
= 𝐼-+
= ..
-,
• よって抵抗𝑅+
に加わる電圧𝑉-+
は
• 𝑉-+
= 𝑅+𝐼-+
= 𝑅+𝐼-,
= 𝑅+× ..
-,
= -+
-,
×𝑉#
-
+
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
Vi
𝐼6"
𝐼6#
イマジナリショート