MASH Random Bit Stream Generator for Bell-Shaped Distribution
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Solution Overview
Problem
Existing random bit stream generators produce random bit streams with uniform distribution, which do not meet the evolving technological demands and require larger chip areas and higher power consumption.
Innovation Solution
A random bit stream generator comprising a pseudo-random bit stream generator and a multi-stage noise shaping (MASH) delta-sigma modulator, where the MASH modulator receives a first random bit stream and outputs a second random bit stream with a bell-shaped distribution using a higher frequency clock signal, reducing chip area and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing random bit stream generators are used, then uniform distribution is achieved, but the chip area and power consumption increase
Solution Approach 1:
The patent transforms the distribution parameter of the random bit stream from uniform to bell-shaped by using a MASH delta-sigma modulator. This parameter change achieves the desired Gaussian distribution特性 while reducing the chip area compared to traditional uniform distribution generators
2Manufacturing precision
If existing random bit stream generators are used, then uniform distribution is achieved, but power consumption increases
Solution Approach 1:
The patent changes the distribution parameter to bell-shaped and uses a MASH delta-sigma modulator structure that reduces power consumption. The multi-stage noise shaping architecture achieves efficient power utilization while generating the required Gaussian distribution random bit stream
3Reliability
If random bit streams with bell-shaped distribution are generated, then dynamic range is improved, but device complexity increases
Solution Approach 1:
The patent divides the random bit stream generation process into two segments: a pseudo-random bit stream generator for base random sequence generation, and a MASH delta-sigma modulator for transforming the distribution. This segmentation achieves bell-shaped distribution with improved dynamic range while managing device complexity through modular architecture
Solution Approach 2:
The MASH delta-sigma modulator acts as an intermediary component that transforms the uniform distribution output from the pseudo-random generator into a bell-shaped distribution output. This intermediary structure enables dynamic range improvement without directly complicating the core random generation mechanism
Data Source
AI summary
A random bit stream generator which includes a pseudo-random bit stream generator and a multi-stage noise shaping (MASH) delta-sigma modulator is introduced. The pseudo-random bit stream generator may generate a first random bit stream according to a first clock signal. The MASH delta-sigma modulator is coupled to the first random bit stream generator to receive the first random bit stream and output a second random bit stream according to the first random bit stream and a second clock signal. A frequency of the second clock signal is greater than a frequency of the first clock signal, and the random bit stream has bell-shaped distribution. A method of generating a random bit stream having bell-shaped distribution adapted to a random bit stream generator is also introduced.