The simulation model and ASIC implementation of a random bit source circuit

This paper presents a random bit source circuit for information security SoC platform application. A new type of oscillator, taking the form of combinational logic circuit and using complex feedback networks, is applied in the circuit. A series of MATLAB/Simulink models based on the circuit structure are established for the random bit source. To improve the accuracy, models for the two dominant noise sources in CMOS circuits are also presented. These models make the fast simulation realizable. ASIC implementation is performed to verify the circuit design and simulation model. The theory analyses and testing results both indicate that the generated random binary sequences have a high speed and good randomness properties..