Random Number Generating Circuit High Rate Quality
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Solution Overview
Problem
Conventional small-scale random number circuits face challenges in generating high-quality random numbers at high rates, often requiring trade-offs between generating rate and quality, and previous solutions either increase circuit scale or introduce periodicity in random number sequences.
Innovation Solution
A random number generating circuit that transforms a 1-bit physical random number sequence into a twofold faster digital random number sequence using a combination of continuous signal processing, high-rate signal introduction, and smoothing units, maintaining randomness and quality even at increased generating rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a small-scale physical random number circuit is used, then the circuit size is reduced, but the generating rate is forced to be lowered to ensure sufficient quality of random numbers
Solution Approach 1:
The patent divides the random number generation process into multiple stages: a physical random number generator produces base random bits, which are then processed through multiple doubling circuits that sequentially double the generating rate. This segmentation allows the system to achieve high generating rates without requiring a large-scale physical random number circuit, thus resolving the contradiction between small circuit size and high generating rate
Solution Approach 2:
The patent transforms the random number sequence through multiple dimensions by applying sequential doubling operations. Each doubling circuit processes the output from the previous stage, effectively multiplying the generating rate by 2^n where n is the number of doubling circuits. This dimensional transformation approach enables high generating rates while maintaining a compact circuit architecture
2Productivity
If multiple random number circuits are provided to increase generating rate, then the generating rate is improved, but the circuit scale increases
Solution Approach 1:
The patent merges multiple random number generation functions into a single integrated circuit architecture. Instead of providing separate physical random number circuits, the invention combines a base physical random number generator with multiple doubling circuits that share common resources and processing paths, achieving high generating rates without proportionally increasing circuit scale
Solution Approach 2:
The patent implements a nested structure where doubling circuits are arranged in a hierarchical manner. Each doubling circuit processes the output from the previous stage and feeds into the next, creating a nested configuration where n doubling circuits are contained within a unified architecture. This nesting approach achieves 2^n rate multiplication while keeping the overall circuit scale manageable
3Productivity
If random number data is stored in memory and rapidly read out, then the generating rate is improved, but the frequency of using random numbers is limited to ensure sufficient time for storing
Solution Approach 1:
The patent performs preliminary action by continuously generating and processing random numbers through the doubling circuits in real-time, rather than storing them in memory for later retrieval. The sequential doubling process maintains a continuous stream of high-rate random numbers, eliminating the need to limit usage frequency based on storage time requirements
4Productivity
If a stored random number sequence is operated with a slowly generated random number sequence, then the generating rate is improved, but the random numbers exhibit periodicity
Solution Approach 1:
The patent introduces dynamics by using sequential doubling circuits that actively process and transform the random number sequence in real-time. Each doubling circuit dynamically processes the input from the previous stage, creating a continuously evolving random number stream. This dynamic processing approach avoids the periodicity issues associated with static memory-based solutions while maintaining high generating rates and randomness quality
Data Source
AI summary
A random number generating circuit receives as input a first digital random number signal generated at a first generating rate and produces as output a second digital random number signal having a second generating rate that is twice as high as the first generating rate. A semiconductor integrated circuit, an IC card and an information terminal device comprising the random number circuit is provided.