Temperature-Compensated Clock Sampling for High-Speed Digital Links
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Solution Overview
Problem
High clock frequencies in digital communications can lead to data corruption due to excessive propagation delay, especially in systems where signal propagation delay varies with temperature.
Innovation Solution
A digital communication system that uses a temperature sensor to derive a delay value corresponding to temperature-dependent variations in signal propagation delay, generating a variable clock signal with a variable delay to sample the received digital data signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high clock frequency is used, then data transfer rate and fidelity are improved, but signal propagation delay causes data corruption
Solution Approach 1:
The patent applies dynamics by making the clock signal delay variable rather than fixed. The processing device adjusts the delay of the clock signal dynamically based on temperature conditions to match the varying propagation delay of data signals, enabling high clock frequencies to operate reliably without data corruption
Solution Approach 2:
The patent changes the parameter of clock signal delay based on temperature. A temperature sensor detects temperature variations, and the processing device modifies the clock signal delay parameter accordingly to compensate for temperature-dependent propagation delay changes in the data signal path
2Measurement precision
If high clock frequency is used, then improved fidelity and accuracy are achieved, but propagation delay variation with temperature causes data corruption
Solution Approach 1:
The patent implements feedback by using a temperature sensor to continuously monitor temperature conditions and feeding this information back to the processing device. The processing device then adjusts the clock signal delay based on the temperature feedback, creating a closed-loop system that maintains data integrity despite temperature variations
Solution Approach 2:
The system dynamically adjusts the clock signal delay in response to temperature changes, making the timing relationship between clock and data signals adaptive rather than static. This dynamic adjustment enables high-fidelity data transfer across varying temperature conditions
Data Source
AI summary
A digital communication system includes a processing device, a remote device, a signal path including one or more components and providing a communicative connection between the processing device and the remote device, and at least one temperature sensor arranged to sense a temperature and send a sensed temperature value to the processing device. The processing device is arranged to generate a clock signal and send the clock signal through the signal path to the remote device. The remote device is arranged to generate a digital data signal with a timing based on the received clock signal and send the digital data signal through the signal path to the processing device. The processing device is further arranged to derive a delay value from the sensed temperature value, obtain a variable clock signal having a variable delay relative to the clock signal, and use the variable clock signal to sample the received digital data signal.