Segmented Power Supply Circuit Layout for Noise Isolation
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Solution Overview
Problem
Existing electric circuits face challenges in stabilizing operations due to power supply noise interference between circuits, which affects the stability and efficiency of signal transmission.
Innovation Solution
The proposed electric circuit design includes a first and second power-supply line, a ground line, and specific configurations of RC series circuits, capacitors, and noise filters to reduce power supply noise and stabilize circuit operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a series circuit constituted by a resistor and a capacitor is connected to each of the plurality of circuits, then the power supply noise of each individual circuit is reduced, but the power supply noise produced by one circuit still interferes with another circuit via the power supply path
Solution Approach 1:
The power supply system is segmented into multiple independent power supply lines, each serving specific circuits. By dividing the power supply network, noise generated in one segment does not propagate to other segments, thereby solving the interference problem while maintaining individual noise reduction effectiveness.
Solution Approach 2:
A noise filter is introduced as an intermediary component between different power supply lines. This filter acts as a mediator that blocks noise transmission from one circuit to another while allowing normal power supply current to pass through, thus preventing cross-circuit interference.
2Device complexity
If multiple circuits share a common power supply path, then the device complexity is reduced, but power supply noise interference between circuits increases
Solution Approach 1:
The common power supply path is divided into multiple separate power supply lines. Each line is assigned to specific circuits based on their noise sensitivity and operational characteristics. This segmentation reduces noise coupling between circuits while maintaining manageable system complexity through organized power distribution.
Solution Approach 2:
Different power supply lines are configured with different characteristics (e.g., filtering levels, impedance) according to the specific requirements of the circuits they serve. High-speed or noise-sensitive circuits receive power through lines with enhanced noise filtering, while less sensitive circuits use standard power paths, optimizing overall system performance.
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 effectively reduces power supply noise, enhances the stability of circuit operations, and minimizes interference between circuits, leading to improved performance and reliability.
Implementation Method 1
The impedance of the power supply path is called source impedance. The current that flows through the power supply path and the source impedance cause potential fluctuation
Implementation Method 2
The first circuit includes a first capacitance component having a first capacitance. The second circuit includes a second capacitance component having a second capacitance
Implementation Method 3
The noise filter is disposed between the first power-supply line and the second power-supply line
Data Source
AI summary
An electric circuit includes a first power-supply line, a second power-supply line, a ground line, a first circuit, a second circuit, an RC series circuit, a capacitor, and a noise filter. The first circuit is configured to be electrically connected to the first power-supply line via a first power-supply terminal and electrically connected to the ground line via a first ground terminal. The second circuit is configured to be electrically connected to the second power-supply line via a second power-supply terminal and electrically connected to the ground line via a second ground terminal. The RC series circuit is disposed between the first power-supply terminal and the first ground terminal. The capacitor is disposed between the second power-supply terminal and the second ground terminal. The noise filter is disposed between the first power-supply line and the second power-supply line.