Abstract: An analog/digital converter includes a peak holding circuit for holding a peak voltage of input analog data and a peak time detecting circuit for detecting a point of time when the input analog data reaches a peak voltage. Also included is a constant current discharging circuit for discharging the peak voltage held in the peak holding circuit at a constant current from the peak point of time detected by the peak time detecting circuit. The converter also includes a zero time detecting circuit for detecting a zero point of time when a voltage held in the peak holding circuit is reduced to zero and a time to digital converting circuit for counting a number of pulses in a pulse line obtained by gating clock pulses during a period of time from the peak time detected by the peak detecting circuit to the zero time detected by the zero time detecting circuit, the time to digital converting including a counter to output digital data corresponding to the input analog data.

Abstract: A method of correcting a dead time in an analog/digital converter or a linear amplifier in which a time, which is obtained by adding a time, from a predetermined level to a peak of an output generated by a slow amplifier after an input of a pulse signal from a first amplifier, to a time required for treating an output signal from said slow amplifier, is used as a dead time to reduce a correcting error.