Detection Circuit for Power Source State Monitoring
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Solution Overview
Problem
Existing detection circuits fail to accurately determine when a power source has reached a stable state or is experiencing rapid power down, leading to operational errors in electronic devices.
Innovation Solution
A detection circuit with a first and second detection path generates distinct currents based on the power source's state, producing a detection signal that indicates whether the power source is in a low-voltage or rapid-power-down state, ensuring proper initialization and reset operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reset circuit using resistor, capacitor, and schmitt trigger is used to generate reset signal, then the reset function is provided, but the reset circuit may end resetting before the power source reaches stable state leading to operational error
Solution Approach 1:
The patent implements a feedback mechanism by using a detection circuit that continuously monitors the power source voltage and generates a detection signal. This feedback signal controls the reset circuit to start or stop resetting based on the actual state of the power source, ensuring resetting completes only when the power source reaches stable state, thus resolving the contradiction between reset speed and reset accuracy
Solution Approach 2:
The detection circuit automatically monitors the power source state and controls the reset timing without external intervention. The system uses its own internal detection capability to determine when resetting should start and stop, making the reset process self-regulating and preventing premature termination while maintaining efficient operation
2Device complexity
If the power source state is not detected before resetting ends, then the reset circuit operates independently, but the electronic device may experience operational errors due to premature reset termination
Solution Approach 1:
The patent introduces a detection circuit as an intermediary component between the power source and the reset circuit. This intermediary monitors the power source voltage and translates it into a detection signal that controls the reset timing, adding minimal complexity while dramatically improving operation reliability by ensuring reset completes at the correct moment
3Device complexity
If electronic devices do not detect rapid power down, then the device structure remains simple, but normal operations cannot be guaranteed during power anomalies
Solution Approach 1:
The detection circuit is designed to perform multiple functions: it detects both the stable state of the power source for reset timing control and identifies rapid power down conditions. This multi-functionality allows a single circuit to maintain operation stability under various power conditions without requiring separate detection systems, balancing complexity and reliability
Data Source
AI summary
The present invention provides a detection circuit, which comprises a first detection path and a second detection path for detecting the state of a power source under test. A first current is generated on the first detection path according to power source under test; a second current is generated on the second detection path according to the power source under test. The detection circuit generates a detection signal according to the first current and the second current. The detection signal represents the state of the power source under test.