粒子探测器读出电路中模数转化器建模及参数设计

在基于数字信号处理的粒子探测器读出电路设计中,模数转化器(analog to digital converter,ADC)是一个关键的模块。ADC的采样率和精度是限制探测系统达到最佳噪声性能的主要参数。基于Matlab的Simulink环境建立了粒子探测器读出电路中ADC的仿真模型,并通过Matlab仿真验证了模数转化器的采样速度、精度对系统噪声的影响,给出了在基于数字信号处理的粒子探测器读出电路设计中,模数转换器的参数设计方案。     

Digital 1 V 82 μW Pseudo-Two-Stage Class-AB OTA

A low power digital operational transconductance amplifier(OTA) was developed for low voltage switched capacitor applications.The OTA has a high slew rate(SR) and a large open loop gain with a differential pseudo-two-stage Class-AB structure.A fully compensated depletion mode capacitor is used in the switched capacitor common mode feedback block instead of a metal-insulator-metal(MIM) capacitor to reduce the fabrication cost.Simulations show that with a 1.0-V supply voltage and a 34-pF load at each output t...