Apparatus for measuring photon information and photon measurement device

An apparatus for measuring photon information, comprising a signal conversion module, an integral comparison module, a transmission control module, a negative feedback module, and a measurement module, wherein

• the signal conversion module is configured to connect to a photoelectric sensor and convert an initial signal outputted by the photoelectric sensor into a converted signal in a voltage form;
• the integral comparison module is connected to an output of the negative feedback module and the signal conversion module and is configured to connect to the photoelectric sensor, and the integral comparison module is configured to integrate a difference between the initial signal and a feedback signal from the negative feedback module, and to generate a comparison signal based on a magnitude relationship between a reference level and a combination result of an integral signal and the converted signal, wherein the integral signal is a signal for representing an integral of the difference between the initial signal and the feedback signal;
• an input of the transmission control module is connected to an output of the integral comparison module, and the transmission control module is configured to control the comparison signal to be transmit based on a clock signal to output a digital signal, wherein a high level in the digital signal and with a duration equal to the cycle of the clock signal represents a first logic level, a low level in the digital signal and with a duration equal to the cycle of the clock signal represents a second logic level;
• an input of the negative feedback module is connected to an output of the transmission control module, and the negative feedback module is configured to convert the digital signal into the feedback signal and feed the feedback signal back to the integral comparison module;
• and
• an input of the measurement module is connected to the output of the integral comparison module and/or the output of the transmission control module, and the measurement module is configured to determine, based on the comparison signal and/or the digital signal, an arrival time of a high-energy photon detected by the photoelectric sensor.