Clock Synchronization Circuit for Impedance Measurement Precision
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Solution Overview
Problem
In systems with multiple oscillators, mismatches in phase and frequency of clock signals can impact system operation, leading to inaccuracies in impedance measurements and battery state analysis.
Innovation Solution
A device and method for clock synchronization that includes a clock source, a counter, a command generation circuit, and a communication interface, which generates and transmits synchronization commands to adjust the frequency and phase of a target clock to match a reference clock, thereby synchronizing clocks across the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple oscillators are used in a system, then the system can perform parallel processing and increase productivity, but phase and frequency mismatches between clock signals degrade measurement precision
Solution Approach 1:
The patent implements a feedback mechanism where the reference device continuously monitors the target device's clock signal and transmits correction commands via communication interface. The target device receives these commands and adjusts its oscillator frequency and phase accordingly, creating a closed-loop system that maintains synchronization and ensures measurement precision while allowing multiple oscillators to operate in parallel.
Solution Approach 2:
The patent changes the operational parameters of the target oscillator by transmitting frequency and phase correction commands. The target device adjusts its clock signal parameters (frequency and phase) based on comparisons with the reference clock, thereby resolving the mismatch issue while maintaining the productivity benefits of multiple oscillators.
2Measurement precision
If clock synchronization commands are transmitted frequently to maintain precision, then measurement accuracy improves, but communication overhead and device complexity increase
Solution Approach 1:
The patent employs periodic action by transmitting synchronization commands at predetermined time intervals rather than continuously. The reference device waits for a specified period before transmitting the next frequency and phase correction commands, which reduces communication overhead and simplifies the synchronization circuit while maintaining adequate timing alignment accuracy for impedance measurements.
Data Source
AI summary
A device includes a communication interface, a command processing circuit, a clock synchronization circuit, and a controllable clock source. The command processing circuit has a command input, a reference frequency output, and a reference phase output. The command input is coupled to the communication interface. The clock synchronization circuit has a reference frequency input, a reference phase input, and a frequency control output. The reference frequency output is coupled to the reference frequency input, and the reference phase input coupled to the reference phase output. The clock synchronization circuit includes a frequency synchronization circuit and a phase synchronization circuit. The controllable clock source has a frequency control input and a clock output. The frequency control input is coupled to the frequency control output.