Design And Implementation Of Highly Reliable Radiation Hardened Sense Amplifier Flip Flop

In modern times,with the continuous development of aviation industry,aerospace technology has become increasingly mature.When electronic equipment is working in the space area of space,radiation effects may occur,which may cause abnormal functions of the aircraft and cause huge losses.In the memory and processor circuits of aerospace applications,the sense amplifier flip-flop has the advantages of high differential input reliability and short set up time,and has been widely used.The high reliability and radiation hardened sense amplifier flip flop structure has great engineering application value.Firstly,this paper studies the existing radiation hardened sense amplifier flip flop structure,analyzes its single event effect theoretical basis and error mechanism.and on this basis,in view of the shortcomings of the existing structure,through timing sampling technology,a method based on DICE(Dual Interlock Cell Element)structure reinforced radiation hardened sense amplifier flip flop circuit structure,the latch part of the circuit is connected by a double interlock structure,adding additional timing control signals to drive the parallel nmos and short circuit nmos,in solving the problem of self-locking At the same time,it also allows the input data to change after sampling.For applications with higher reliability requirements,this paper also proposes a radiation hardened sense amplifier flip flop with DONUT(Double Node Upset Tolerant)structure reinforcement.The simulation shows that for the injection of 750 f C deposited charge,the structure can be from any recovered in single-node and double node single event upset.In terms of performance,compared with the dual mode redundancy flip flop,the structure proposed in this paper has stronger single event upset hardened ability and smaller propagation delay.Then,this paper implements the proposed radiation hardened sense amplifier flip flop.Under the SMIC0.13μm process,the circuit layout design is carried out with reinforcement technologies such as half ring grid reinforcement,ring grid reinforcement,and protection ring.After inspection and circuit consistency verification,the parasitic parameter information in the layout is extracted.Subsequently,post-simulation verification was performed on the reinforced flip flop circuit,and the changes in the performance parameters and radiation hardened of the simulation were compared and analyzed.The post-simulation shows that the flip flop structure proposed in this paper meets the requirements of the radiation hardened capability index.At the same time,performance parameters such as delay power consumption have increased compared with the previous simulation results.Finally,this paper establishes a standard unit of a high-reliability radiation hardened sense amplifier flip flop,extracts the logical and physical information of the reinforced flip flop,and generates a standard unit file of the reinforced flip flop so that it can be applied to subsequent large scale applications in the design of radiation hardened circuit system.