Neuron Circuit Overflow Retention for More Accurate Firing
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Solution Overview
Problem
Conventional neuron circuits discard overflow signals after firing, leading to potential loss of information and reduced accuracy in pattern recognition tasks.
Innovation Solution
A neuron circuit design that includes a synaptic integration unit, a pulse generation unit, and an overflow signal retaining unit, which retains the overflow signal exceeding the threshold voltage after firing, allowing it to be fed back and utilized for weight adjustment in the synapse element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional neuron circuit fires when the accumulated voltage exceeds the threshold, then the neuron circuit operates efficiently with clear firing decision, but the overflow signal exceeding the threshold voltage is discarded causing information loss and reduced pattern recognition accuracy
Solution Approach 1:
The patent extracts the overflow signal from the capacitor voltage and processes it separately through a dedicated overflow signal processing circuit. This circuit generates an overflow signal when the capacitor voltage exceeds the threshold voltage, and this extracted overflow signal is then fed back to the synapse element to adjust weights, thereby preserving the information that would otherwise be discarded in conventional circuits.
Solution Approach 2:
The patent implements a feedback mechanism where the generated overflow signal is fed back to the synapse element to adjust the weight. This feedback loop allows the system to utilize the overflow information for learning and adaptation, converting what was previously discarded information into useful signals for improving pattern recognition accuracy.
2Productivity
If the overflow signal is discarded after firing, then the circuit operation is simple and fast, but the pattern recognition accuracy is reduced due to information loss
Solution Approach 1:
The patent extracts the overflow signal component from the total capacitor voltage and processes it through a dedicated overflow signal processing circuit. This extraction allows the main firing decision to proceed quickly while the extracted overflow information is simultaneously utilized for weight adjustment, thereby maintaining circuit speed while improving recognition accuracy.
Solution Approach 2:
The overflow signal is generated and processed in parallel with the main firing decision process, rather than sequentially. This preliminary action allows the overflow information to be prepared and fed back to adjust weights without delaying the primary firing operation, thus maintaining high circuit operation speed while improving accuracy.
3Device complexity
If the neuron circuit uses a simple threshold-based firing mechanism, then the device complexity is low, but the overflow signal information is lost reducing overall system performance
Solution Approach 1:
The patent segments the voltage processing function into two separate pathways: one for the main firing decision based on threshold comparison, and another for overflow signal extraction and processing. This segmentation allows the simple threshold-based firing mechanism to remain unchanged while adding a parallel overflow processing path that improves reliability without significantly increasing overall system complexity.
Solution Approach 2:
The overflow signal processing circuit serves multiple functions: it detects when the capacitor voltage exceeds the threshold, generates the overflow signal, and feeds it back to adjust synapse weights. This multi-functional component improves pattern recognition reliability while adding minimal complexity to the overall system.
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
This design enhances the accuracy of pattern recognition by retaining the overflow signal, increasing the number of firing operations and reducing the error rate, thereby improving the overall performance of the neuron circuit.
Implementation Method 1
a synaptic integration unit including a capacitor charged by a current flowing into the synapse element depending on the output signals of the pre-neuron circuit and the post-neuron circuit
Implementation Method 2
the overflow signal retaining unit may include a first inverter circuit receiving the charging voltage of the capacitor and a second inverter circuit receiving an output signal of the first inverter circuit, and the overflow signal retaining unit may be configured to copy the charging voltage of the capacitor to store the copied charging voltage in an output terminal of the second inverter circuit
Implementation Method 3
a second transistor. The charging voltage of the capacitor may be input, which is copied to the output terminal of the second inverter circuit is input to a gate of the first transistor. An output signal the second inverter may be input to a gate of the second transistor, and the second transistor may discharge the output terminal of the second inverter circuit depending on the output signal of the second inverter
Data Source
AI summary
Disclosed is a neuron circuit in which an overflow signal before fire is retained after the fire. The neuron circuit according to an embodiment of the inventive concept includes a synapse element, a synaptic integration unit and a pulse generation unit. The synapse element receives output signals of a pre-neuron circuit and a post-neuron circuit. The synaptic integration unit includes a capacitor charged by the current flowing into the synapse element depending on the output signals of the pre-neuron circuit and the post-neuron circuit. The pulse generation unit generates an output pulse from the charging voltage of the capacitor. The pulse generation unit includes a pulse generation circuit generating the output pulse depending on the charging voltage of the capacitor and an overflow signal retaining unit connected between the capacitor and the pulse generation circuit and retaining an overflow signal, which exceeds a threshold voltage among the charging voltage of the capacitor after the pulse generation unit fires.