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Reply to ‘Comment on Can a pulse excitation smaller than kT be detected?’

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An amplifier with noise densities iamp2 and uamp2 has a pulse-energy sensitivity ≈ iampuamp. This limit applies not only to charge pulses in a capacitor, but also to oscillations in a high-Q-factor resonator operated at an arbitrary temperature T if delay-line filtering is used. Q does not need to be larger than 4kT/R0iamp2, where Ro = √(L/C).

References

    1. 1)
      • E.A.U. Faulkner , M.J. Buckingham . Comment on ‘Can a pulse excitation smaller than kT be detected?’. Electron. Lett. , 152 - 153
    2. 2)
      • D.G. Maeder . Can a pulse excitation smaller than kT be detected?. Electron. Lett. , 767 - 769
    3. 3)
      • E. Kowalski . (1970) , Nuclear electrons.
    4. 4)
      • D.G. Maeder . Transmission-line analysis of gravitational pulse detector response functions. Z. Angew. Math. & Phys.
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