In the readout of silicon photomultipliers (SiPMs), the original current signals are usually divided into different channels — fast timing channels, slow energy channels, position encoding channels, facilitating the formation of different trigger types. This paper proposes a modified dynamic time over threshold (DTOT) method to obtain the energy information in the slow energy channel using the fast timing trigger of a 6 mm SiPM coupled to a 10 mm cubic GAGG scintillator. The dynamic threshold generator is triggered by a fast timing signal instead of the energy signal itself. The feasibility of this method was verified using a prototype circuit, wherein the integral nonlinearity was measured to be 1.5%. This method can easily introduce external triggers to the DTOT system, such as a coincident signal with a specific trigger logic, which can extend the application of the DTOT method.

在硅光电倍增管（SiPM）的读出中，原始电流信号通常分为不同的通道——快速定时通道、慢速能量通道、位置编码通道，便于形成不同的触发类型。本文提出了一种改进的动态超阈值时间 (DTOT) 方法，使用耦合到 10 mm 立方 GAGG 闪烁体的 6 mm SiPM 的快速定时触发器来获取慢能量通道中的能量信息。动态阈值发生器由快速定时信号而非能量信号本身触发。使用原型电路验证了该方法的可行性，其中测量积分非线性为 1.5%。这种方法可以很容易地将外部触发引入 DTOT 系统，例如具有特定触发逻辑的重合信号，