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1 - 宇宙線研究室 - 京都大学

1 - 宇宙線研究室 - 京都大学

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84 6 (2.5 )6.4 6.4.1 OpAmp FET OpAmp GND (CF) (eg. ∼ 0.1pC) (eg.∼ pF) (?? C CABLE pF C CABLE C FC F C F C F OpAmp A Q Q = Q cable + Q F (6.34)Q cable = V in C cable (6.35)V out = −A · V in (6.36)Q F = −(V out − V in )C F (6.37)Q F= (A + 1)C F(6.38)Q cable C cableQ cable =Q F =C cableQ(A + 1)C F + C cable(6.39)(A + 1)C FQ(A + 1)C F + C cable(6.40)OpAmp C F (A + 1) C F RF10E6ΩIPINPLSCCABLE+- AMMTRIN 0.000 pA1E-12F CF2E-12F+ - OPAMP-+VOUT+ -0.000 pV 6.30:

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