Semiconductor I/O Line Precharge for Interference-Free Data Transitions
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Solution Overview
Problem
As semiconductor devices become finer, the narrow intervals between input and output lines lead to interference phenomena, causing errors in data level transitions and slow logic level changes, necessitating methods to prevent such errors.
Innovation Solution
The semiconductor system drives adjacent lines to the same logic level prior to data toggling by using transmitters and receivers to synchronize operations, ensuring consistent logic levels during initialization and write operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the interval between multiple input and output lines is made very narrow to improve integration density, then manufacturing precision and device density are improved, but interference phenomena occur between adjacent lines causing data level transition errors
Solution Approach 1:
The patent applies preliminary action by precharging adjacent input and output lines to the same logic level before data transfer operations. The data input circuit precharges lines to a first logic level, and the data output circuit precharges lines to a second logic level before actual data transfer, preventing interference during simultaneous toggling of adjacent lines with narrow spacing
2Productivity
If adjacent input and output lines are toggled at the same time to improve data transfer speed, then productivity is improved, but interference occurs causing logic level transition errors
Solution Approach 1:
The patent uses preliminary action to precharge lines before simultaneous toggling occurs. By establishing a known initial state where adjacent lines are at the same logic level before the toggle operation, the system enables simultaneous data transfer while preventing interference-induced errors
Solution Approach 2:
The patent implements feedback mechanisms where the data input circuit and data output circuit monitor and control the logic levels of adjacent lines. The circuits ensure that lines are precharged to appropriate levels and maintain control during the toggle operation to prevent interference while enabling high-speed data transfer
Data Source
AI summary
A data input and output circuit includes a data input circuit configured to precharge first and second input and output lines after the end of a power-up operation and configured to generate first and second input data by driving the first and second input and output lines from each of which transfer data having a set logic level, among first and second transfer data, are output after the start of a write operation. The data input and output circuit also includes a data output circuit configured to generate first and second internal data based on logic levels of the first and second input data.