Adaptive Oscillator Loop Gain for Low-Jitter Reliable Startup
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Solution Overview
Problem
Oscillators face challenges in achieving high operation reliability, low jitter of oscillation signals, and reduced power consumption, particularly due to variations in loop gain that can lead to non-oscillation and system malfunctions.
Innovation Solution
A device and method that includes an oscillator with an adaptive loop gain control mechanism, utilizing a phase detector, voltage generator, frequency divider, and controller to adjust loop gain until oscillation is achieved, minimizing power consumption and ensuring stable output signals with low jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If loop gain is increased to ensure oscillation, then reliability of oscillation is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the loop gain adjustable rather than fixed. The controller dynamically changes the loop gain value based on real-time detection of oscillation state, transitioning between different gain levels to optimize both reliability and power consumption depending on operational conditions.
Solution Approach 2:
The patent changes the loop gain parameter adaptively. The controller modifies the loop gain value based on detected oscillation characteristics, allowing the system to operate at lower power consumption when oscillation is stable while ensuring reliable startup and maintenance of oscillation when conditions require it.
2Reliability
If loop gain is increased to reduce jitter, then signal stability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts loop gain based on detected jitter levels. When jitter is high, the controller increases loop gain to improve signal stability. When oscillation is stable with low jitter, the controller reduces loop gain to minimize power consumption, achieving adaptive optimization of both signal quality and energy efficiency.
Solution Approach 2:
The loop gain parameter is changed adaptively in response to detected oscillation quality. The controller monitors jitter and adjusts the loop gain value accordingly, allowing the system to maintain high signal stability when needed while reducing power consumption during stable operation periods.
3Use of energy by moving object
If loop gain is decreased to reduce power consumption, then power efficiency is improved, but oscillation reliability deteriorates
Solution Approach 1:
The system dynamically switches between high and low loop gain modes based on operational phase. During startup or when oscillation is detected as unstable, the controller uses high loop gain to ensure reliable oscillation. Once oscillation is established and stable, the controller transitions to low loop gain mode to minimize power consumption, achieving both reliability and efficiency at different times.
Solution Approach 2:
The loop gain parameter is adaptively changed based on oscillation detection results. The controller increases loop gain when oscillation is absent or unstable to ensure reliability, and decreases loop gain when oscillation is stable to improve power efficiency, optimizing the parameter according to real-time system state.
4Reliability
If adaptive loop gain control is implemented, then oscillation reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by having the oscillation detector monitor the oscillation signal and provide information to the controller. The controller uses this feedback to automatically adjust the loop gain, creating a closed-loop control system that improves oscillation reliability without requiring manual intervention or complex external control mechanisms.
Solution Approach 2:
The system performs self-adjustment of loop gain through automatic detection and control. The oscillation detector and controller work together to autonomously monitor oscillation state and modify loop gain as needed, allowing the system to self-optimize its performance without external intervention, thereby improving reliability while keeping the control mechanism integrated and manageable.
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
The solution ensures reliable and efficient oscillation by stabilizing output signals with low jitter and minimizing power consumption, reducing the frequency of non-oscillation errors and enhancing system performance.
Implementation Method 1
an oscillator including at least one inductor and at least one capacitor and configured to generate, based on a positive supply voltage, an output signal oscillating in a resonance frequency of the at least one inductor and the at least one capacitor
Data Source
AI summary
A device includes an oscillator including at least one inductor and at least one capacitor and configured to generate, based on a positive supply voltage, an output signal oscillating in a resonance frequency of the at least one inductor and the at least one capacitor. The device further includes an oscillation detector configured to determine whether the output signal oscillates based on a clock signal and increase a loop gain of the oscillator until the output signal oscillates.