Avalanche Photodiode Pulse Conversion for Multi-Voltage Readout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing photoelectric conversion apparatuses face challenges in achieving high integration and speed while managing different power supply voltages for photodiode and circuit units, with limited configurations discussed in previous patents.
Innovation Solution
A photoelectric conversion apparatus utilizing a diode of avalanche amplification type, pulse shaping and conversion circuits, and signal processing circuits supplied with multiple power supply voltages, where the difference between the first and second power supply voltages is greater than the difference between the third and fourth power supply voltages, allowing for efficient pulse signal processing and conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple power supply voltages are used for photodiode and circuit units, then photoelectric conversion speed and integration are improved, but voltage difference management and signal amplitude control become more complex
Solution Approach 1:
The apparatus segments the power supply system into multiple voltage domains: a first power supply voltage for the photodiode array and a second power supply voltage for the circuit units. This segmentation allows each component to operate at its optimal voltage level, improving photoelectric conversion speed while managing complexity through structured voltage distribution.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the relationship between power supply voltages. Specifically, it controls the difference between the first and second power supply voltages to be greater than the difference between third and fourth power supply voltages, optimizing signal amplitude matching and reducing interference while maintaining high conversion speed.
2Reliability
If pulse signal amplitude difference is minimized, then signal processing reliability is improved, but power supply voltage configuration becomes more complex
Solution Approach 1:
The patent minimizes pulse signal amplitude differences by carefully configuring power supply voltage parameters. It establishes that the difference between the first and second power supply voltages exceeds the difference between the third and fourth power supply voltages, ensuring optimal signal amplitude matching between photodiode output and circuit unit input, thereby improving signal processing reliability.
Solution Approach 2:
The circuit units act as intermediaries between the photodiode array and the readout system. By positioning circuit units at a specific voltage level (second power supply voltage) that is intermediate between the photodiode voltage and the final output voltage, the system achieves smooth signal transition and amplitude matching, reducing distortion and improving reliability.
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 configuration enables a high degree of integration and speed in photoelectric conversion while minimizing the difference in pulse signal amplitudes, enhancing reliability and operational efficiency.
Implementation Method 1
a diode of avalanche amplification type
Data Source
AI summary
A photoelectric conversion apparatus includes a pulse shaping circuit that shapes an output from a diode of avalanche amplification type into a pulse, and a pulse conversion circuit that converts a pulse signal output from the pulse shaping circuit. The pulse conversion circuit converts a pulse signal having a first amplitude and output from the pulse shaping circuit into a pulse signal having a second amplitude smaller than the first amplitude.