Low-Frequency Oscillator for Precise Sleep Mode Wake-Up
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Solution Overview
Problem
Existing electrical devices face high power consumption and imprecise wake-up times in transitioning from sleep mode to operating mode, particularly with high-frequency oscillators, which are energy-intensive and not suitable for energy-saving operations.
Innovation Solution
A method utilizing a low-frequency oscillator that generates two phase-shifted analog signals, allowing a comparator to produce an interrupt signal for mode transition with low power consumption, enabling precise timing and energy-efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high-frequency oscillator is used to provide an exact timebase for wake-up timing, then the timing precision is improved, but the power consumption increases significantly
Solution Approach 1:
The oscillator is divided into multiple independent oscillating elements (first oscillating element and second oscillating element) that can operate at different frequencies. This segmentation allows the system to use lower-frequency elements for timing purposes, reducing power consumption while maintaining timing precision through the combined operation of multiple elements.
Solution Approach 2:
The system changes the operating parameters of the oscillator by using multiple oscillating elements with different frequencies rather than a single high-frequency element. By adjusting and combining signals from elements operating at optimized frequency points, the system achieves the required timing precision with lower overall power consumption.
2Use of energy by moving object
If a low-frequency oscillator is used to reduce power consumption, then the energy efficiency is improved, but the timing precision deteriorates
Solution Approach 1:
Multiple oscillating elements with different frequencies are merged together to form a composite timing signal. The evaluation unit combines the outputs of these elements, leveraging their different frequency characteristics to achieve both low power consumption and high timing precision that neither element could provide alone.
Solution Approach 2:
The oscillator system is designed to serve multiple functions simultaneously: individual oscillating elements can operate independently for different timing requirements, and their combined output provides the precise wake-up timing. This multi-functionality allows the system to maintain precision while optimizing power consumption across different operating conditions.
3Adaptability or versatility
If multiple different frequency signals are used for timebase generation, then the control flexibility and setting options are improved, but the device complexity increases
Solution Approach 1:
The oscillating elements are structured in a nested or integrated manner within the oscillator apparatus, with each element contained within the overall oscillator structure. This nesting allows multiple frequency-generating elements to coexist in a compact arrangement, providing control flexibility without proportionally increasing external complexity.
Solution Approach 2:
The evaluation unit acts as an intermediary that receives signals from multiple oscillating elements and processes them into a unified timing output. This intermediary component simplifies the interface between the complex multi-frequency oscillator and the rest of the system, managing the complexity internally while presenting a clean output.
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 provides an energy-saving and precise timebase for waking up electrical devices from sleep mode with low energy consumption, reducing electrosmog and offering extensive control options while maintaining a secure transition to the operating mode.
Implementation Method 1
an oscillator apparatus provides a first analog signal with a first frequency and second analog signal with a second frequency
Implementation Method 2
a comparator apparatus compares the first analog signal and/or second analog signal with at least one reference value or a reference value range
Data Source
AI summary
A method is provided for operating an electrical device (14) which has an operating mode and a sleep mode, in which method an oscillator apparatus (20) provides a first analog signal (f(t)) with a first frequency and second analog signal (f′(t)) with a second frequency, wherein the second analog signal (f′(t)) is different from the first analog signal (f(t)), a comparator apparatus (28) compares the first analog signal (f(t)) and/or second analog signal (f′(t)) with at least one reference value (Uref) or a reference value range, and an interrupt signal for transferring from the sleep mode into the operating mode is produced if a certain comparison result is detected.