Ring Oscillator Startup Using Low-to-High Frequency Switching
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Solution Overview
Problem
Existing oscillators face challenges with limited operating frequency and difficulties in starting oscillation, which restrict their performance and application.
Innovation Solution
An oscillation device comprising a control circuit and a ring oscillation circuit that generates an oscillation signal with a first frequency and adjusts it to a higher second frequency using a control signal, allowing the device to start oscillation at a lower frequency and stabilize before increasing to a higher frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct oscillation method is used to start the oscillator, then the oscillation can start quickly, but the risk of failure to oscillate increases and the operating frequency is limited
Solution Approach 1:
The patent applies preliminary action by first generating an oscillation signal at a first (lower) frequency to ensure reliable startup, then switching to a second (higher) frequency once oscillation is established. This preliminary low-frequency oscillation phase prepares the system for subsequent high-frequency operation, avoiding direct high-frequency startup failures.
2Reliability
If the operating frequency is limited to ensure reliable oscillation startup, then the oscillation can start reliably, but the oscillator performance is poor and the operating frequency cannot be set high
Solution Approach 1:
The patent implements dynamics by making the oscillation frequency adjustable and time-dependent. The oscillator dynamically transitions from a first frequency to a second frequency based on the startup phase. During startup, it operates at the first frequency for reliability, then switches to the second frequency for high-performance operation, achieving both reliability and high speed requirements at different time stages.
Solution Approach 2:
The system performs preliminary oscillation at a lower first frequency to ensure reliable startup conditions are met, then transitions to higher second frequency operation. This preliminary low-frequency phase prepares the oscillator circuit for subsequent high-frequency operation, enabling both reliable startup and high performance.
3Productivity
If high operating frequency is used to improve oscillator performance, then the performance is improved, but the oscillation startup becomes difficult and may fail
Solution Approach 1:
The patent applies preliminary action by first establishing oscillation at a lower first frequency where startup is more reliable, then transitioning to the higher second frequency for improved performance. This preliminary low-frequency oscillation phase ensures the oscillator circuit is properly initialized before attempting high-frequency operation.
Solution Approach 2:
The oscillator employs periodic action by implementing frequency switching based on startup status. It periodically transitions from the first frequency to the second frequency, using control signals to manage the frequency change. This periodic frequency adjustment ensures reliable startup followed by high-performance operation.
Data Source
AI summary
The present application discloses an oscillation device and a method for oscillation thereof, in which a control signal is generated from a control circuit to a ring oscillation circuit. The ring oscillation circuit generates an oscillation signal with a first signal frequency at start up oscillation, firstly. Further, the ring oscillation circuit modulates an oscillation frequency to drive the oscillation signal change from the first signal frequency to a higher second signal frequency. Thus, the present application provides the ring oscillation device generating the oscillation signal with a lower frequency at starting up oscillation, and then make the oscillation signal change to a higher frequency. Hereby, the present application provides the oscillation signal operated at a higher operating frequency.