Oscillator and true random number generating circuit formed by same

Abstract

The invention discloses an oscillator and a true random number generating circuit formed by the same in the field of design of an integrated circuit. The oscillator adopts a novel structure; a main loop can adopt a quadrilateral, octagonal or dodecagonal structure or other structures, i.e. a 4n-gonn structure, wherein n is an integer greater than zero. The true random number generating circuit comprises a high-speed oscillator, a low-speed oscillator, an xor circuit, a clock circuit, a system clock circuit and a sampling circuit. The oscillator provides a random source for the true random number generating circuit, forms the high-speed oscillator and the low-speed oscillator and is controlled by two external enable signals a and b; signals at the output ends of the high-speed oscillator and the low-speed oscillator are different or the high-speed oscillator and the low-speed oscillator output primary random number seeds; the clock circuit and the system clock circuit control the sampling circuit to carry out sampling on the primary random number seeds for twice so as to generate a true random number sequence; the true random number generating circuit solves the problems of poor randomness and periodic generation of the true random number sequence.

Description

Technical field [0001] The invention belongs to the field of integrated circuit design, and relates to an oscillator and a true random number generating circuit composed of an oscillator. The true random number sequence generated by the circuit has a high degree of randomness and can be applied to various security encryption fields that require true random numbers. Such as high security RFID tags. Background technique [0002] With the development of wireless communication, information security is becoming more and more important. The communication system needs encryption and decryption technology to achieve secure communication, which cannot do without random numbers. Random numbers include pseudo-random numbers and true random numbers. Pseudo-random numbers are realized by mathematical algorithms. When the seed sequence at its input is determined and the algorithm is determined, its output signal is determined. The pseudo-random number has the characteristics of randomness, bu...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an oscillator and a true random number generating circuit composed thereof, the purpose of which is to solve the problem of poor randomness of random numbers, so that the generated true random number sequences are unpredictable and non-repetitive

Images