Voltage Detection Circuit with Step-Down Sub-Circuits
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Solution Overview
Problem
Existing voltage detection circuits have complex structures that make it difficult to integrate them onto a chip, due to the presence of multiple components such as current-limiting resistors and optocouplers.
Innovation Solution
A voltage detection circuit comprising a first step-down sub-circuit, a second step-down sub-circuit, and a first voltage-stabilizing sub-circuit, which are connected in series and include simple components, allowing for a simpler structure that can be easily integrated on a chip, with the sub-circuits operating in short-circuit and stabilization states to accurately track input voltage changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional voltage detection circuit uses multiple components such as current-limiting resistors and optocouplers, then the detection accuracy is improved, but the structure becomes complex and difficult to integrate on a chip
Solution Approach 1:
The patent merges multiple discrete components (current-limiting resistors, optocouplers, voltage stabilizing circuits) into an integrated step-down sub-circuit module. This consolidation maintains the functional capabilities of voltage detection and stabilization while reducing structural complexity and enabling chip integration. The step-down sub-circuit combines voltage regulation and detection functions in a single integrated unit.
2Measurement precision
If the voltage detection circuit includes multiple sub-circuits for accurate tracking, then the detection precision is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic operation of the step-down sub-circuits where they switch between active step-down mode and short-circuit state based on real-time voltage conditions. When one step-down sub-circuit is actively stepping down voltage for precise tracking, the other is in short-circuit state to minimize power consumption. This dynamic switching mechanism maintains high detection precision while significantly reducing overall power consumption compared to continuously operating multiple active circuits.
Data Source
AI summary
A voltage detection circuit, a power supply system and a chip are provided. The voltage detection circuit includes: a first step-down sub-circuit, a second step-down sub-circuit and a first voltage-stabilizing sub-circuit; wherein the first step-down sub-circuit has one end connected to one end of the second step-down sub-circuit in series; the first step-down sub-circuit has another end connected to a first port of the voltage detection circuit; and the second step-down sub-circuit has another end connected to a second port of the voltage detection circuit; and wherein the first voltage-stabilizing sub-circuit has one end connected to a third port of the voltage detection circuit and has another end connected to the second port, where the first voltage-stabilizing sub-circuit is turned on when the third port has a voltage higher than the second port and stabilized when the third port has a voltage lower than the second port.