Digital Oscillator Feedback Control for Compact Frequency Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digitally controlled oscillators face challenges in accurately controlling frequency generation while maintaining a reduced layout area, as they are often large and prone to environmental and manufacturing errors.
Innovation Solution
A digitally controlled oscillator is designed with a digital control unit that compensates for differences between a feedback signal and a reference power, using a power level setting unit and power level compensation unit to generate an output clock with precise oscillation frequency, and a power control oscillation unit that receives the output power to generate the oscillation frequency, allowing for reduced layout area and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large layout area is used for the oscillator, then frequency control accuracy is improved, but the device occupies more space and becomes less integrated
Solution Approach 1:
The oscillator is divided into multiple independent units including a digital control unit with power level setting unit and power level compensation unit, and a power control oscillation unit. This segmentation allows each unit to perform specific functions with optimized area, achieving accurate frequency control without requiring a large overall layout area.
Solution Approach 2:
The patent uses digital control signals to change power levels and oscillation frequency parameters. The power level setting unit sets reference power levels based on digital control signals, and the power level compensation unit adjusts power levels to compensate for environmental variations, enabling accurate frequency control through parameter adjustment rather than large physical dimensions.
2Area of stationary object
If the oscillator is made compact to reduce layout area, then device integration is improved, but frequency control accuracy and stability deteriorate due to environmental and manufacturing errors
Solution Approach 1:
The power level compensation unit implements a feedback mechanism that receives feedback signals from the power control oscillation unit and adjusts the reference power level accordingly. This feedback loop compensates for environmental variations and manufacturing errors, maintaining frequency stability in the compact oscillator design.
Solution Approach 2:
The power level setting unit pre-adjusts the reference power level based on digital control signals before the oscillation occurs. This preliminary action prepares the system to operate at the correct power level, compensating for anticipated environmental variations and manufacturing tolerances before they affect frequency stability.
3Measurement precision
If traditional oscillator design is used to ensure frequency accuracy, then frequency control is improved, but device complexity and layout area increase
Solution Approach 1:
The patent replaces traditional analog oscillator control mechanisms with a digital control system. The digital control unit receives digital control signals and uses them to set and compensate power levels, substituting complex analog tuning mechanisms with simpler digital logic, thereby reducing device complexity while maintaining frequency control accuracy.
Data Source
AI summary
Provided are a digitally controlled oscillator and an electronic device including the digitally controlled oscillator. The digitally controlled oscillator includes a digital control unit and a power control oscillation unit. The digital control unit compensates for a difference between a feedback signal of an output power and a reference power set based on an input digital control signal and outputting an output power. The power control oscillation unit receives a signal related to the output power, and generates an output clock having an oscillation frequency in response to the signal related to the output power.