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Abstract

A novel charge pulse detection circuit is presented, consisting of a continuous reset resistor in series with the charge pulse generator, followed by a simple amplifier and pulse shaping circuit. Realization with a 0.18 μm CMOS process (UMC) will result in input-referred charge noise of less than 30 electrons r.m.s. at room temperature, corresponding to an energy resolution in single-photon X-ray sensing of about 110 eV.

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