Clock Signal Compensation Circuit for Temperature-Driven Frequency Offset
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Solution Overview
Problem
Existing clock signal generation circuits in electronic devices are prone to frequency offset due to temperature, air pressure, and process variations, leading to abnormal device operation over time.
Innovation Solution
A clock signal generation circuit that includes an initial clock providing circuit, a control word providing circuit, and a target clock generating circuit, where the control word providing circuit detects temperature and other parameters to generate a frequency control word, which is used to adjust the initial clock signal and produce a target clock signal with a frequency that compensates for offset, ensuring stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frequency source (such as crystal oscillator) is used to generate clock signal, then the electronic device can operate with a basic clock signal, but the oscillating frequency is prone to offset due to temperature, air pressure or process factors
Solution Approach 1:
The patent implements a feedback mechanism where the actual oscillating frequency is detected and compared with the target frequency, and the frequency control word is adjusted based on the frequency offset to compensate and maintain accurate clock signal frequency
Solution Approach 2:
The patent changes the parameter of frequency control word based on detected frequency offset, temperature, and pressure conditions to dynamically adjust and compensate the oscillating frequency, transforming a static frequency source into a dynamically adjustable system
2Measurement precision
If frequency compensation is implemented to reduce frequency offset, then the clock signal accuracy is improved, but the circuit complexity increases due to additional detection and control components
Solution Approach 1:
The frequency control word serves multiple functions: it controls the frequency of the clock signal, stores compensation values for different temperature and pressure conditions, and acts as a feedback control variable, reducing the need for separate dedicated components for each function
3Reliability
If real-time frequency compensation is performed using temperature and pressure detection, then the frequency offset is reduced, but the energy consumption and processing time increase
Solution Approach 1:
The patent pre-establishes the correspondence relationship between frequency offset and environmental parameters (temperature, pressure) through calibration, storing compensation data in advance. During operation, the system only needs to retrieve and apply the pre-calculated frequency control word based on detected conditions, avoiding complex real-time calculations and reducing energy consumption
Data Source
AI summary
A clock signal generation circuit, a method for generating a clock signal, and an electronic device are provided, relating to the field of communications technology. In the clock signal generation circuit, an initial clock providing circuit can generate an initial clock signal having an initial frequency; a control word providing circuit can determine a target frequency offset of the initial frequency based on a detected target parameter and generate a frequency control word based on the target frequency offset; a target clock generating circuit can generate a target clock signal having a target output frequency based on the frequency control word and the initial clock signal, wherein the target output frequency is negatively correlated with a value of the frequency control word and positively correlated with the initial frequency.