Detector Panel Power Supply Circuit for X-ray Imaging
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Solution Overview
Problem
Existing X-ray imaging apparatuses face challenges in balancing power consumption and power supply rejection ratio (PSRR) in their detector panels, leading to reduced battery life and image noise.
Innovation Solution
The detector panel incorporates a dual-stage power supply system with a switching regulator and linear regulators, allowing configuration between a single and series connection of linear regulators, and adjustable feedback gain based on register values to switch between low power consumption and low noise modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple linear regulators are connected in series to achieve high PSRR, then the power supply rejection ratio is improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent implements a dynamic power supply system that can switch between different configurations: single linear regulator, series connection of two linear regulators, or combination with switching regulator. The system dynamically selects the appropriate configuration based on operational requirements, allowing PSRR to be optimized when needed while minimizing power consumption during normal operation.
Solution Approach 2:
The patent changes the operational parameters of the power supply system by adjusting the number and configuration of linear regulators in series, and by modifying the feedback gain of the switching regulator. These parameter changes enable the system to adapt between high PSRR mode and low power consumption mode, resolving the contradiction between reliability and energy usage.
2Use of energy by moving object
If a switching regulator is used to reduce power consumption, then battery life is extended, but the power supply rejection ratio decreases and power noise increases
Solution Approach 1:
The patent merges switching regulator and linear regulator into a hybrid power supply system. The switching regulator provides efficient power conversion and low power consumption, while the linear regulator(s) are added to filter out switching noise and provide high PSRR when needed. This combination allows the system to achieve both low power consumption and high reliability.
Solution Approach 2:
The linear regulator acts as an intermediary between the switching regulator and the load. It filters the noisy output from the switching regulator and provides clean, stable voltage with high PSRR to sensitive components, thereby mediating between the conflicting requirements of low power consumption and high power supply rejection ratio.
3Reliability
If the number of linear regulators is increased to improve PSRR, then the power supply rejection ratio increases, but the device complexity and power consumption increase
Solution Approach 1:
Instead of permanently increasing the number of linear regulators, the system dynamically configures the power supply architecture. A switching regulator is used as the primary power source, and linear regulators are engaged only when high PSRR is required. This dynamic approach achieves high reliability when needed without permanently increasing device complexity.
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 extends battery life while maintaining high image quality by adaptively managing power consumption and noise levels, allowing for efficient operation in both low power and low noise modes.
Implementation Method 1
a first power supply circuit for adjusting the output voltage of the battery by means of switching regulation, to supply the output to the second signal processing circuit
Implementation Method 2
The linear regulator contributes to the improvement of the PSRR
Implementation Method 3
the detector panel includes an X-ray detector, a signal processing circuit for interface, and a battery for power supply
Data Source
AI summary
A detector panel having therein an X-ray detector, a signal processing circuit for interface, and a battery for power supply, the detector panel includes a first signal processing circuit for processing the detection signals from the X-ray detector, a second signal processing circuit for processing the output signal from the first signal processing circuit, a first power supply circuit for adjusting the output voltage of the battery by means of switching regulation, to supply the output to the second signal processing circuit, a second power supply circuit for adjusting the output voltage of the first power supply circuit by means of switching regulation, to supply the output to the X-ray detector and the first signal processing circuit, and a switching circuit for switching the configuration of the second power supply circuit between a single connection of one linear regulator and a series connection of two linear regulator.