Reference Voltage Training Method for Semiconductor Devices
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Solution Overview
Problem
Conventional reference voltage training in semiconductor devices requires a geometrical progression increase in time and current consumption as the number of bits increases, due to the need for multiple write and read operations for each combination of code signals.
Innovation Solution
A method where data is stored in response to reference voltages set for respective combinations of code signals, allowing simultaneous output through a single read operation, thereby reducing the time and current required for training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple write and read operations are performed for each combination of code signals, then reference voltage training accuracy is improved, but training time increases in geometrical progression
Solution Approach 1:
The patent combines multiple separate write and read operations into a single integrated operation. Instead of performing sequential write-read cycles for each code signal combination, the invention merges all training operations into one simultaneous process that achieves the same reference voltage calibration accuracy while dramatically reducing the total time required.
Solution Approach 2:
The patent prepares and configures all code signals and reference voltage levels in advance before the actual training operation. By pre-setting the code signal combinations and corresponding reference voltage levels, the system eliminates the need for repeated setup and configuration during the training process, thereby reducing overall training time while maintaining accuracy.
2Measurement precision
If multiple write and read operations are performed for each combination of code signals, then reference voltage training accuracy is improved, but current consumption increases in geometrical progression
Solution Approach 1:
The patent merges multiple energy-consuming write and read operations into a single simultaneous operation. By combining all training operations into one process, the total current consumption is reduced while still achieving the necessary reference voltage calibration accuracy, as the merged operation performs all required measurements and adjustments in parallel rather than sequentially.
3Measurement precision
If the number of code signal bits increases, then reference voltage discrimination precision is improved, but training time and current consumption increase in geometrical progression
Solution Approach 1:
The patent transitions from sequential one-dimensional processing to parallel multi-dimensional processing. By utilizing multiple code signal combinations simultaneously in a single training operation, the system achieves high reference voltage discrimination precision with increased bit depth without suffering from geometrical progression in training time, as all combinations are processed in parallel rather than sequentially.
Data Source
AI summary
A method for conducting reference voltage training includes setting levels of a reference voltage in response to code signals and receiving and storing data for the respective levels of the reference voltage, and simultaneously outputting the stored data.