Oscillator Waveform Shaping for Phase Noise and Power Switching
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Solution Overview
Problem
Existing circuit devices struggle to balance phase noise and power consumption in output clock signals, with existing technologies not effectively addressing the need for both low noise and low power consumption modes.
Innovation Solution
A circuit device with an oscillation circuit, waveform shaping circuit, and output circuit that allows switching between a low phase noise mode and a low power consumption mode by adjusting the driving capability and power supply voltage of the waveform shaping circuit, using nonvolatile memory or external control to switch modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the driving capability of the waveform shaping circuit is increased to reduce phase noise, then phase noise is reduced, but power consumption increases
Solution Approach 1:
The waveform shaping circuit's driving capability is made dynamically adjustable through switching between two operational modes. A mode selection circuit receives external control signals to switch between a first mode with higher driving capability (lower phase noise) and a second mode with lower driving capability (lower power consumption), allowing the system to adapt its performance characteristics based on operational requirements.
Solution Approach 2:
The invention changes the operational parameters of the waveform shaping circuit by switching between different driving capability settings. The mode selection circuit alters key parameters such as current levels and voltage levels in the waveform shaping circuit, enabling transition between low phase noise operation and low power consumption operation.
2Reliability
If the driving capability of the waveform shaping circuit is increased to improve output signal quality, then phase noise is reduced, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the waveform shaping circuit's operating state based on external control signals. When high signal quality is required, the mode selection circuit switches to the first mode with higher driving capability. When power savings are prioritized, it switches to the second mode with reduced driving capability, providing flexible quality-power tradeoff management.
Solution Approach 2:
The invention modifies operational parameters including current levels and voltage levels in the waveform shaping circuit to achieve different performance states. These parameter changes enable the circuit to operate in either high-quality mode or low-power mode depending on system requirements.
3Object-affected harmful factors
If the waveform shaping circuit operates in high driving capability mode to reduce phase noise, then phase noise is reduced, but power consumption increases
Solution Approach 1:
The mode selection circuit enables dynamic switching between two distinct operational states of the waveform shaping circuit. The first mode is optimized for low phase noise with higher energy consumption, while the second mode is optimized for low power consumption with higher phase noise, allowing the system to adapt to different operational conditions.
Solution Approach 2:
The invention implements parameter changes in the waveform shaping circuit by controlling current levels and voltage levels through the mode selection circuit. These parameter adjustments enable transition between energy-efficient operation and low phase noise operation.
Data Source
AI summary
A circuit device is configured to switching between a first mode in which phase noise of an output clock signal is lower than that in a second mode and the second mode in which power consumption is smaller than that in the first mode, and the circuit device includes an oscillation circuit configured to generate an oscillation signal, a waveform shaping circuit configured to perform waveform shaping on the oscillation signal to obtain a rectangular wave clock signal; and an output circuit configured to output the output clock signal based on the clock signal. A driving capability of the waveform shaping circuit in the first mode is higher than a driving capability of the waveform shaping circuit in the second mode.