Shared Voltage Divider Circuit for Low-Current Voltage Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing voltage detectors consume high current due to the large number of circuits required for low-voltage and high-voltage detection, including voltage divider, reference voltage, and comparator circuits.
Innovation Solution
A voltage detector design that shares a single voltage divider circuit between low-voltage and high-voltage detection circuits, utilizing NMOS transistors and a constant current source to reduce circuit complexity and current consumption, while maintaining detection functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate voltage divider circuits, reference voltage circuits, and comparator circuits are used for both low-voltage and high-voltage detection, then detection functionality is complete, but current consumption increases and circuit complexity increases
Solution Approach 1:
The patent merges the voltage divider circuit into a single shared component that provides divided voltages to both the low-voltage detection circuit and the high-voltage detection circuit. This consolidation eliminates the need for separate voltage divider circuits for each detection function, directly reducing the total number of circuits and current consumption while maintaining complete detection functionality for both voltage thresholds.
Solution Approach 2:
The shared voltage divider circuit performs multiple functions by providing divided voltages to both detection circuits simultaneously. This multi-functional design allows a single circuit to serve dual purposes (low-voltage detection and high-voltage detection), reducing overall circuit complexity and power consumption while ensuring reliable detection of both voltage conditions.
2Reliability
If separate voltage divider circuits, reference voltage circuits, and comparator circuits are used for both low-voltage and high-voltage detection, then detection functionality is complete, but circuit complexity increases
Solution Approach 1:
The patent merges the voltage divider circuit into a single shared component that provides divided voltages to both the low-voltage detection circuit and the high-voltage detection circuit. This consolidation eliminates the need for separate voltage divider circuits for each detection function, directly reducing the total number of circuits and current consumption while maintaining complete detection functionality for both voltage thresholds.
Solution Approach 2:
The shared voltage divider circuit performs multiple functions by providing divided voltages to both detection circuits simultaneously. This multi-functional design allows a single circuit to serve dual purposes (low-voltage detection and high-voltage detection), reducing overall circuit complexity and power consumption while ensuring reliable detection of both voltage conditions.
Data Source
AI summary
A voltage detector includes a first voltage detection circuit, a second voltage detection circuit, and a voltage divider circuit having a first node for providing a first divided voltage, and a second node for providing a second divided voltage. The second voltage detection circuit has a comparator circuit including a first input end connected to the first node and a second input end connected to a reference voltage. The first voltage detection circuit has a first NMOS transistor including a gate to which the second divided voltage is applied, and a constant current source with one end connected to the first NMOS transistor. The first NMOS transistor is configured to turn on in response to the second divided voltage being higher than a second threshold voltage and turn off in response to the second divided voltage being lower than the second threshold voltage.