buck-boost电路的无源滤波仿真，有单周期控制模块和BUCK-BOOST电路模块组成-buck-boost circuit of the passive filter simulation, there is single-cycle control module and BUCK-BOOST circuit modules

The intention of the work is to analyze the feasibility of using a Sigma-Delta modulator based analog-to-digital converter for true random number generation, whereas the noise source is integrated into modulator’s loop as well as design a Sigma-Del