Comparator Output Circuit With Amplitude Limiting for Stable Readout
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Solution Overview
Problem
Existing imaging apparatuses face challenges in maintaining consistent output signal amplitude due to changes in bias electric current, leading to increased reading time and image quality degradation.
Innovation Solution
Incorporating a comparator with an amplitude limiting element and a variable voltage source, controlled by a control unit, to adjust the gate-source voltage and maintain a constant output signal amplitude across different imaging modes, thereby reducing the impact of current changes on reading time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the bias electric current of the output circuit is changed, then power consumption can be optimized, but the amplitude of the output signal cannot be maintained at a desired voltage
Solution Approach 1:
The patent implements a feedback mechanism where the control unit monitors the output signal amplitude and adjusts the bias electric current accordingly. When the output signal amplitude deviates from the desired voltage level, the control unit modifies the bias current to bring the amplitude back to the target range, thereby maintaining signal stability while optimizing power consumption.
Solution Approach 2:
The patent dynamically changes the bias electric current parameter based on operating conditions and output signal requirements. By adjusting this parameter, the system can optimize power consumption during different imaging modes while the control unit ensures the output signal amplitude remains within acceptable ranges through coordinated control.
2Use of energy by moving object
If the bias electric current is reduced to optimize power consumption, then energy efficiency improves, but the reading time increases
Solution Approach 1:
The patent employs dynamic control of the bias electric current, allowing the system to switch between different current levels based on imaging mode requirements. During high-priority imaging operations, the control unit increases the bias current to reduce reading time, while during lower-priority operations, it reduces the current to save power, creating a dynamic balance between speed and energy efficiency.
Solution Approach 2:
The control unit periodically adjusts the bias electric current based on the imaging sequence and signal characteristics. By implementing periodic optimization cycles, the system can reduce power consumption during stable operating conditions while maintaining readiness to increase current when rapid signal acquisition is needed, thus managing the trade-off between reading time and power consumption.
3Use of energy by moving object
If the bias electric current is changed, then power consumption can be adjusted, but the image quality degrades
Solution Approach 1:
The control unit continuously monitors image quality metrics and output signal characteristics, adjusting the bias electric current to maintain optimal image quality. When image quality begins to degrade due to current changes, the feedback mechanism modifies the current level or applies compensation algorithms to restore quality standards while still achieving power consumption optimization.
Solution Approach 2:
The patent adjusts multiple parameters simultaneously, including bias electric current, amplification factors, and signal processing gains. By coordinating these parameter changes, the system can reduce power consumption through lower bias current while compensating for potential image quality degradation through adjusted processing parameters, thereby maintaining overall image quality standards.
Data Source
AI summary
A circuit includes a comparator configured to compare an input signal and another signal and output a signal indicating a result of a comparison, and an element configured to limit an amplitude of the signal indicating the result of the comparison. In a case where a current flowing through the circuit is changed, the element is able to make an adjustment of a range of a change in the amplitude due to the change in the current.