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Veljko Radeka : Notes on the origin of charge amplifiers J uly2, 2014

Veljko Radeka : Notes on the origin of charge amplifiers J uly2, 2014. The first record of a Charge-Sensitive Amplifier Circuit . Classical “integrator” known from WWII ( 1941-5,) appears as charge amplifier in ~ 1950-ies ( Gatti , et al.):. 1948. C f. C f.

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Veljko Radeka : Notes on the origin of charge amplifiers J uly2, 2014

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  1. VeljkoRadeka: Notes on the origin of charge amplifiersJuly2, 2014

  2. The first record of a Charge-Sensitive Amplifier Circuit Classical “integrator” known from WWII (1941-5,) appears as charge amplifier in ~1950-ies (Gatti, et al.): 1948 Cf Cf Input capacitance ~ open-loop gain x Cf Vacuum tube at the input until ~1963 when the first JFET is used …

  3. The “last word” from vacuum tubes – introducing Gedetectors (Tavendale,1963) Original charge preampwith JFET, 1968 The Cascode! Feedback Noise: ~200 e rms at 20pF, 1-2μs

  4. From: V. Radeka “State of the art of low noise amplifiers for semiconductor radiation detectors” Proc. Intern. Symp. Nuclear electronics, vol. I (1968), p. 46.1, 28

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