Charge-Accumulating Noise Reduction Circuit Without Frame Memory
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Solution Overview
Problem
Conventional noise reduction circuits require expensive external frame memories, which is a limitation in terms of cost and practicality.
Innovation Solution
A noise reduction circuit that uses an amplifier circuit, a voltage difference detection circuit, and an electric charge accumulation circuit to attenuate noise without external memories, or a voltage adding circuit to enhance signal components while reducing noise, both achieving noise suppression without external memory requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional noise suppression using frame memories is used, then noise can be reduced, but expensive external frame memories must be provided
Solution Approach 1:
The patent merges the noise reduction function with the existing signal processing circuit by integrating frame memory functionality into the noise reduction circuit itself. The circuit processes multiple frames of image data through amplification, voltage difference detection, and electric charge accumulation within a single integrated structure, eliminating the need for separate external frame memories while maintaining noise reduction capability.
Solution Approach 2:
The noise reduction circuit is designed to perform multiple functions: it amplifies input signals, detects voltage differences between frames, accumulates electric charges corresponding to these differences, and outputs the processed signal. This multi-functional design replaces what would traditionally require separate dedicated frame memory components, reducing overall system complexity and cost.
2Object-affected harmful factors
If external frame memories are provided for noise suppression, then noise reduction is achieved, but cost increases
Solution Approach 1:
The patent combines the frame memory function with the noise reduction circuit into a single integrated unit. By making the noise reduction circuit perform both signal storage and processing functions, the design eliminates the need for separate expensive frame memory components, thereby reducing manufacturing cost while maintaining effective noise suppression.
Solution Approach 2:
The noise reduction circuit is designed to be self-sufficient by incorporating its own frame memory functionality. The circuit uses its internal capacitors and charge accumulation mechanisms to store and process multiple frames of data without requiring external memory support, making the system more cost-effective and easier to manufacture.
Data Source
AI summary
A noise reduction circuit outputs a signal corresponding to a voltage difference between two different signals. The noise reduction circuit includes: an amplifier circuit for amplifying the two different signals at different timings; and a voltage difference detection circuit for detecting a voltage difference between the two different signals amplified by the amplifier circuit. The noise reduction circuit accumulates, a predetermined number of times, an electric charge corresponding to the voltage difference detected by the voltage difference detection circuit and combines the accumulated electric charges to output a resultant electric charge.