Delay-Locked Loop Phase Control for Voltage-Induced Latency Jumps
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Solution Overview
Problem
Delay locked loop devices are affected by latency jumps due to unstable external voltages, leading to timing drifts and challenges in maintaining a fixed timing relationship between signals.
Innovation Solution
The delay locked loop device includes a receiver, delay line, frequency detection and control circuit, phase detector, and delay control circuit, which dynamically adjust the phase detector's activation period based on the operating frequency to mitigate latency jumps caused by fluctuations in external power supply voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the phase detector operates continuously to maintain accurate phase detection, then timing precision is improved, but power consumption increases and voltage fluctuations cause latency jumps
Solution Approach 1:
The phase detector is activated periodically based on the clock cycle count rather than continuously. The frequency detection and control circuit monitors the clock signal frequency and activates the phase detector at specific intervals determined by a counter that counts clock cycles. This periodic activation reduces power consumption and minimizes the impact of voltage fluctuations while maintaining adequate timing detection accuracy.
Solution Approach 2:
The system dynamically adjusts the phase detector activation strategy based on detected clock frequency. The frequency detection and control circuit adapts the counting period and activation intervals according to the actual operating conditions, allowing the system to optimize between power consumption and timing accuracy in real-time based on the clock signal characteristics.
2Stability of the object's composition
If the phase detector is activated frequently to detect phase differences, then timing drift is reduced, but the impact of voltage fluctuations on delay time increases
Solution Approach 1:
The system uses periodic activation of the phase detector based on clock cycle counting rather than continuous operation. The frequency detection and control circuit determines optimal activation intervals that balance timing drift correction needs with reduced sensitivity to voltage fluctuations during delay line operations.
Solution Approach 2:
The system implements feedback through the frequency detection and control circuit that monitors clock signal characteristics and adjusts phase detector activation timing accordingly. This feedback mechanism allows the system to adapt to changing conditions and optimize the balance between timing stability and voltage fluctuation impact.
3Productivity
If the delay line operates at higher frequencies to improve signal processing speed, then productivity is improved, but phase detection accuracy becomes more difficult to maintain
Solution Approach 1:
The system dynamically adapts its phase detection strategy based on the detected clock frequency. The frequency detection and control circuit modifies the counter initialization values and activation intervals according to the operating frequency, allowing accurate phase detection across a wide range of signal processing speeds.
Solution Approach 2:
The system changes operational parameters including counter initialization values and phase detector activation intervals based on the detected clock frequency. This parameter adaptation allows the phase detection mechanism to maintain accuracy whether operating at higher frequencies for improved productivity or lower frequencies for enhanced precision.
Data Source
AI summary
A delay locked loop device is provided, which includes a receiver, a delay line, a frequency detection and control circuit, a phase detector, and a delay control circuit. The receiver compares an input clock signal and a reference voltage to generate a first signal, and generate a reference clock signal based on the input clock signal. The delay line delays the first signal to generate a second signal based on a delay control signal. The frequency detection and control circuit detects an operating frequency of the reference clock signal to generate an enable signal. The phase detector detects, in response to the enable signal, a phase difference between the reference clock signal and a feedback clock signal to generate a phase detection result. The delay control circuit is configured to generate the delay control signal for the delay line based on the phase detection result.