Phase Detection Circuit Multiphase Sampling
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Solution Overview
Problem
Semiconductor integrated circuits face misoperation due to unsynchronized signals and clocks, requiring a phase detection circuit to correct phase differences between transmitted/received signals and clock signals.
Innovation Solution
A phase detection circuit comprising a multiphase clock generation circuit, sampling signal generation circuit, charging voltage generation circuit, and comparison circuit, which generates sampling signals at different phases, compares voltage levels, and adjusts charging voltages to determine phase alignment between data and clock signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a phase detection circuit is added to detect and correct phase differences between signals and clock, then synchronization precision is improved, but device complexity increases
Solution Approach 1:
The phase detection circuit is divided into multiple independent sampling circuits (first, second, third sampling circuits) that operate in parallel. Each sampling circuit samples data at different sampling times and generates corresponding sampling signals. This segmentation allows the circuit to detect phase differences at multiple points simultaneously, improving detection precision while maintaining modular complexity that is easier to implement and verify.
2Measurement precision
If multiple sampling circuits with different sampling times are used to detect phase differences, then phase detection accuracy is improved, but the number of circuit components increases
Solution Approach 1:
Multiple sampling circuits are merged into a unified phase detection structure where the outputs of all sampling circuits are fed into a single charging voltage generation circuit. This charging voltage generation circuit integrates the signals from multiple sampling paths and produces a consolidated phase detection result. By merging the analysis and decision-making functions into a single circuit block, the patent reduces the number of independent circuit components while maintaining multi-point sampling for accurate phase difference detection.
Data Source
AI summary
A phase detection circuit includes a sampling signal generation circuit configured to generate a plurality of sampling signals in response to a plurality of phase change clocks having different phases and data; a charging voltage generation circuit configured to compare the plurality of sampling signals, and change a voltage level of one charging voltage between a first charging voltage and a second charging voltage; and a comparison circuit configured to compare voltage levels of the first and second charging voltages, and generate a result signal.