1 - 宇宙線研究室 - 京都大学

7.3. 105 I E V E R E I E = V E= 2.0V = 1.0mA (7.25)R E 2.0kΩ I B I C I C = βI B (7.26)β = 100 ∼ 500 (7.27)I C = I E = 1.0mA ≪ I B = 2 ∼ 10µA (7.28) R C V C V RC = I C · R C = 1.0mA · 10(kΩ) = 10.0V (7.29)V C = V CC − V RC = 15.0 − 10.0 = 5.0V (7.30)- V CE V CE = V C − V E = 5.0 − 2.0 = 3.0V (7.31)V CE > V BE = 0.7V (7.32) ON R 1 R 2 I bias I B I B I bias =V CC 15V=R 1 + R 2 100kΩ + 22kΩ = 0.12mA ≫ I B = 2 ∼ 10µA (7.33)AC AC v in AC v out v in 0.7V AC v in v B = v E = v in (7.34)R E i E = v ER E= v inR E(7.35)i C = i E = v inR E(7.36)R C v RC = i C · R C (7.37)v out = v C = −v RC = i C · R C (7.38)R C 10kΩ= −v in = −v inR E 2kΩ = −5 · v in (7.39)v out= −5 (7.40)v in-5 AC 5