Multilevel Voltage Detector Circuit With Fixed Detection Windows
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Solution Overview
Problem
Existing multi-level voltage detector circuits face deviations in voltage window values, leading to overlap and conflict between rise and fall detection points at different levels, especially as the number of levels increases.
Innovation Solution
The proposed multi-level voltage detector circuit employs a voltage dividing circuit with a first resistor string and a second circuit, where the second circuit includes a switch network and a second resistor string. This configuration allows for separate lower voltage dividing resistors for each level, enabling fine adjustment of rise and fall detection points and fixing the voltage window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lower voltage dividing resistor is used in existing multi-level voltage detector circuits, then the circuit structure is simple, but the voltage window values deviate and cause overlap and conflict between rise and fall detection points at different levels
Solution Approach 1:
The single lower voltage dividing resistor is segmented into multiple level-specific lower voltage dividing resistors (first lower voltage dividing resistor, second lower voltage dividing resistor, etc.), where each resistor is dedicated to a specific voltage level. This segmentation allows precise control of voltage window values at each level, eliminating overlap and conflict between detection points while maintaining manageable circuit complexity through modular organization.
2Measurement precision
If separate lower voltage dividing resistors are provided for each level, then the voltage window can be fixed with high precision, but the device complexity increases
Solution Approach 1:
Each lower voltage dividing resistor is tailored with specific resistance values optimized for its corresponding voltage level's detection requirements. The first lower voltage dividing resistor has different resistance characteristics than the second, allowing each component to possess local quality suited to its function, achieving high precision voltage window control without requiring excessive components.
Solution Approach 2:
The circuit dynamically selects which lower voltage dividing resistors are active based on the detected voltage level. Through dynamic control of resistor inclusion/exclusion in the dividing circuit, the system achieves precise voltage window fixation at each level while managing overall complexity through conditional activation rather than permanent presence of all components.
3Adaptability or versatility
If the number of voltage detection levels increases, then the detection coverage is improved, but the deviation in voltage window values increases causing more overlap and conflict
Solution Approach 1:
The voltage detection system is segmented into multiple independent level modules, each with its own dedicated lower voltage dividing resistor. This segmentation allows the detection coverage to be extended to multiple levels while maintaining consistent voltage window precision at each level, as each segment operates independently without interfering with others, thus preventing overlap and conflict even as the number of levels increases.
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
The solution achieves precise control of detection points, ensuring a fixed voltage window with an error of less than 1%, thereby improving the accuracy and reliability of voltage detection across multiple levels.
Implementation Method 1
a voltage dividing circuit and the voltage dividing circuit is used for outputting n levels of divisional voltages of a power supply voltage; the voltage dividing circuit includes a first resistor string and a second circuit
Implementation Method 2
when the kth rise detection point is detected, the second circuit provides a kth lower voltage dividing resistor and short-circuits the kth lower voltage dividing resistor
Data Source
AI summary
The present application discloses a multi-level voltage detector circuit. The voltage dividing circuit includes a first resistor string and a second circuit. The first resistor string is formed by n+1 voltage dividing resistors connected in series and outputs n divisional voltages. The second circuit provides n lower voltage dividing resistors. A kth lower voltage dividing resistor detects kth rise and fall detection points of a power supply voltage. When the kth rise detection point is detected, the second circuit provides a kth lower voltage dividing resistor and short-circuits the kth lower voltage dividing resistor. When the kth fall detection point is detected, the second circuit provides the kth lower voltage dividing resistor to a position between a second end of an nth voltage dividing resistor and the ground. As the value of k increases, the resistance of the kth lower voltage dividing resistor decreases.