Signal Detection Circuit for Power Consumption Control
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Solution Overview
Problem
Existing signal detection and power consumption control methods in electronic apparatuses fail to efficiently detect the presence or absence of signals and differentiate between alternating and constant signal states, leading to inefficient power saving due to prolonged bias current flow when signals are not actively switching.
Innovation Solution
A signal detection method utilizing a series connection of p-type and n-type transistors to detect through currents, determining signal states based on the presence or absence of current flow, allowing for efficient power consumption reduction by distinguishing between alternating and constant signal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a power consumption control device monitors signal state to reduce power consumption, then power consumption is reduced, but the device cannot accurately detect when the signal stops in a high state, leading to failed power saving
Solution Approach 1:
The signal detection function is divided into two independent detection paths: one for detecting signal presence/absence and another for detecting signal level state (high/low). This segmentation allows each path to be optimized for its specific detection task, ensuring accurate detection of both signal stop conditions regardless of whether the signal was at high or low level before stopping.
Solution Approach 2:
The patent introduces an intermediary signal processing stage that converts the original signal into a detection-ready format. By using intermediate signals derived from the original signal through specific circuitry, the system can accurately determine both signal presence and signal level state, enabling reliable power saving decisions regardless of the signal's final state.
2Device complexity
If a simple signal detection method is used, then device complexity is reduced, but the ability to distinguish between alternating and constant signal states is lost
Solution Approach 1:
The detection device is designed with multi-functional capabilities using a unified circuit structure. The same detection circuit can identify multiple signal states (presence/absence, alternating/constant, high/low level) by analyzing different aspects of the signal. This universal design achieves versatile signal state differentiation without proportionally increasing device complexity.
Solution Approach 2:
The patent utilizes changes in signal parameters (frequency, amplitude, duty cycle) to differentiate between signal states. By monitoring parameter variations rather than requiring separate detection circuits for each state, the system achieves comprehensive signal state recognition with minimal circuit complexity.
3Measurement precision
If the signal is integrated to detect stop state, then detection sensitivity is improved, but the detection time is prolonged when signal stops in high state
Solution Approach 1:
The system performs preliminary detection of signal level state before the actual stop detection. By预先 determining whether the signal is at high or low level, the detection circuit can switch to an optimized detection mode appropriate for that state, thereby reducing the overall detection time while maintaining high sensitivity for detecting signal stops in either state.
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 approach enables quick detection of signal states and reduces power consumption by accurately identifying signal activity, thereby minimizing unnecessary power usage and simplifying circuit design.
Implementation Method 1
detecting a through current flowing through a circuit to which the signal is inputted
Data Source
AI summary
A power consumption control device for detecting output of a pulse signal from an output terminal of an oscillator as an operation monitoring target and outputting a power consumption reduction signal when the pulse signal is not detected in a predetermined period of time, includes a p-type transistor and an n-type transistor which are connected in series and have a gate to which the output terminal is connected, and detecting means for detecting a through current flowing through the p-type transistor and n-type transistor, and outputs a power consumption reduction signal when the through current is not detected in a predetermined period of time.