Random Pulse Generator With Feedback Randomness Control
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Solution Overview
Problem
Designing a circuit that generates perfectly random pulses is impractical due to various constraints, necessitating a technique for evaluating and controlling the randomness of random pulses in integrated circuits like memory systems.
Innovation Solution
A random pulse generator comprising a randomness test circuit, a control circuit, a periodic wave generating circuit, and a pulse generating circuit, which tests the randomness of the pulses and adjusts frequency and pulse control information to enhance randomness, using a combination of frequency test, runs test, longest run test, and serial test circuits to generate and refine random pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit is designed to generate random pulses, then randomness is improved, but perfect randomness cannot be achieved due to circuit constraints
Solution Approach 1:
The patent implements a feedback mechanism where the generated random pulse is fed back to a randomness test circuit that evaluates its quality. Based on the test results, the system adjusts control parameters to improve randomness, creating a closed-loop system that continuously optimizes the random pulse generation despite circuit constraints.
Solution Approach 2:
The patent changes key parameters such as the frequency of the periodic wave and pulse control information based on randomness test results. By dynamically adjusting these parameters, the system optimizes the randomness quality of generated pulses while working within the constraints of the circuit design.
2Reliability
If randomness test circuits and control circuits are added to evaluate and control random pulses, then randomness quality is improved, but device complexity increases
Solution Approach 1:
The patent designs the control circuit to perform multiple functions: it generates frequency control information, generates pulse control information, and adjusts parameters based on randomness test results. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby managing complexity while improving randomness quality.
Solution Approach 2:
The patent combines the randomness test circuit, control circuit, periodic wave generating circuit, and pulse generating circuit into an integrated random pulse generation system. By merging these functions into a coordinated system, the patent achieves improved randomness quality while managing overall device complexity through functional integration.
3Reliability
If frequency control information and pulse control information are dynamically adjusted based on test results, then randomness is improved, but operational complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where the system automatically tests its own random pulse output and adjusts its control parameters based on the test results. The control circuit autonomously modifies frequency control information and pulse control information without external intervention, improving randomness while managing operational complexity through self-regulation.
Data Source
AI summary
A random pulse generator includes: a randomness test circuit suitable for testing randomness of a random pulse; a control circuit suitable for generating frequency control information and puke control information based on a test result of the randomness test circuit; a periodic wave generating circuit suitable for generating a periodic wave whose frequency is changed based on the frequency control information; and a pulse generating circuit suitable for generating the random pulse based on the periodic wave and the pulse control information.