Cobalt Ferroboron Spin Hall Device for Compact Max Pooling
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Solution Overview
Problem
Existing convolutional neural networks in image recognition require large on-chip resources due to complex circuit structures, which hinders the development of multi-functional artificial intelligence chips.
Innovation Solution
A spin Hall device with a cobalt ferroboron layer and specific layer configurations, capable of generating a Hall voltage, is used for max pooling operations, reducing circuit complexity and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional digital comparator is used for max pooling operations, then computation accuracy is maintained, but circuit scale increases rapidly and on-chip resources are occupied
Solution Approach 1:
The patent replaces the traditional digital comparator circuit with a spin Hall effect-based device that uses physical field interactions (spin-orbit coupling) to achieve max pooling operations. This substitution eliminates the need for complex digital logic circuits while maintaining computational functionality through analog physical effects.
Solution Approach 2:
The patent changes the operating parameter from digital voltage levels to Hall voltage measurements. By using the spin Hall effect, the device converts input signals into Hall voltage outputs that directly represent max pooling results, avoiding the need for complex digital comparison circuits and reducing circuit scale.
2Productivity
If a traditional digital comparator is used for max pooling, then computation requirements are met, but on-chip resources are occupied
Solution Approach 1:
The patent replaces resource-intensive digital comparator circuits with a compact spin Hall device that performs the same max pooling function using physical field effects. This substitution dramatically reduces the quantity of on-chip resources required while maintaining full computation capability.
Solution Approach 2:
The spin Hall device serves multiple functions: it performs max pooling operations, reduces circuit complexity, and minimizes on-chip resource usage. The single device structure enables both computational functionality and resource efficiency, making it a universal solution for AI chip design.
3Device complexity
If simple structure is implemented, then on-chip resources are reduced, but computation accuracy may be compromised
Solution Approach 1:
The patent uses the spin Hall effect—a well-established physical phenomenon—to ensure that the simple device structure maintains high computation accuracy. The physical effect provides inherent precision in Hall voltage measurement, eliminating the need for complex digital circuits while preserving computational accuracy.
Solution Approach 2:
By changing from digital voltage comparison to analog Hall voltage measurement, the patent achieves both structural simplicity and computation accuracy. The continuous Hall voltage output provides precise computational results without requiring complex digital processing circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The spin Hall device enables efficient max pooling with high computation accuracy while minimizing on-chip resources, optimizing hardware architecture and improving energy efficiency in AI chips.
Implementation Method 1
a spin Hall device is provided. The spin Hall device includes a cobalt ferroboron layer... applying at least one drive current to one end of the first axis of symmetry... obtaining a Hall voltage across the second axis of symmetry
Data Source
AI summary
The present application discloses a spin Hall device, a method for obtaining a Hall voltage, and a max pooling method. The spin Hall device includes a cobalt ferroboron layer. A top view and a bottom view of the spin Hall device are completely the same as a cross-shaped graph that has two axes of symmetry perpendicular to each other and equally divided by each other. The spin Hall device of the present application has non-volatility and analog polymorphic characteristics, can be used for obtaining a Hall voltage and applied to various circuits, is simple in structure and small in size, can save on-chip resources, and can meet computation requirements.