Strobe Delay Path Calibration for PVT-Stable Timing
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Solution Overview
Problem
Semiconductor devices face challenges in maintaining consistent delay path calibration across varying PVT conditions, leading to inaccuracies in signal transmission and processing.
Innovation Solution
A semiconductor device is designed with a strobe transmission circuit that outputs oscillation strobe signals through different delay path circuits during measurement operations, allowing for calibration by comparing toggle counts to synchronize delay amounts, ensuring consistent timing across both paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If delay path calibration is performed under varying PVT conditions, then signal transmission accuracy is improved, but measurement consistency deteriorates due to delay variations
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting delay path calibration parameters based on detected PVT conditions. The system modifies calibration settings in response to temperature, voltage, and process variations, allowing accurate delay compensation across different operating conditions while maintaining measurement consistency through adaptive parameter adjustment.
Solution Approach 2:
The calibration system transitions from static to dynamic operation by continuously monitoring PVT conditions and adjusting delay path calibration in real-time. This dynamic approach enables the system to adapt to changing environmental conditions, maintaining both measurement precision and consistency across varying operational states.
2Manufacturing precision
If delay amounts are calibrated to be equal, then timing synchronization is improved, but adaptability to PVT variations worsens
Solution Approach 1:
The system implements dynamic delay calibration where equal timing synchronization is achieved as a baseline, but the system maintains adaptability by continuously adjusting delay paths in response to PVT variations. This allows the system to preserve timing synchronization while adapting to changing conditions through real-time parameter modification.
Solution Approach 2:
The patent changes delay path parameters dynamically based on PVT conditions. By adjusting calibration parameters in response to temperature, voltage, and process variations, the system maintains timing synchronization while adapting to different operational environments, resolving the contradiction between fixed synchronization and environmental adaptability.
3Measurement precision
If calibration is performed for each PVT condition, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The system performs preliminary calibration actions by establishing baseline delay path settings before actual measurements. This preliminary calibration prepares the system for accurate measurements under varying PVT conditions without requiring full recalibration each time, thereby maintaining measurement accuracy while reducing the time required for each measurement cycle.
Solution Approach 2:
The dynamic calibration system performs rapid adjustments based on detected PVT conditions rather than executing complete calibration sequences. This dynamic approach maintains high measurement accuracy by adapting to conditions in real-time while significantly reducing the time penalty associated with repeated full calibrations.
Data Source
AI summary
A semiconductor device includes a strobe transmission circuit configured to output an oscillation strobe signal, through a first delay path circuit, as a strobe signal when a first measurement operation is performed and configured to output the oscillation strobe signal through a second delay path circuit as the strobe signal when a second measurement operation is performed, and a calibration circuit configured to compare the number of times the strobe signal toggles during the first measurement operation to the number of times the strobe signal toggles during the second measurement operation to calibrate the delay amounts of the first and second delay path circuits to be the same.