Input Buffer Equalization for High-Speed ISI Reduction
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Solution Overview
Problem
Existing data communication systems face challenges in high-speed data transfer due to undesirable inter-symbol interference (ISI) which degrades signal quality and requires high power consumption to mitigate, especially in high-frequency operations.
Innovation Solution
The implementation of an input buffer module with an array of inverters arranged in series, incorporating equalization elements with predetermined resistance values based on delay, to minimize ISI without increasing power dissipation, using CMOS resistors or small inverters with opposite polarity for smaller devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed data transfer is implemented, then bandwidth and data transfer capability are improved, but inter-symbol interference increases and degrades signal quality
Solution Approach 1:
The equalization element is configured in advance within the input buffer module to pre-compensate for signal distortion before data transmission. By anticipating and correcting inter-symbol interference at the source, the system maintains signal quality even at high data transfer speeds, resolving the contradiction between productivity and reliability
2Device complexity
If conventional input buffer modules are used, then device simplicity is maintained, but inter-symbol interference degrades performance
Solution Approach 1:
An equalization element is introduced as an intermediary component within the input buffer module. This element acts as a mediator that compensates for signal distortion caused by the buffer's inherent capacitance, improving communication performance without significantly increasing overall device complexity
3Reliability
If equalization elements are added to reduce ISI, then signal quality is improved, but device complexity increases
Solution Approach 1:
The equalization element is merged into the existing input buffer module structure, combining the equalization function with the buffer's inverter array. This integration approach improves signal-to-noise ratio by reducing inter-symbol interference while minimizing the increase in device complexity through functional consolidation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces ISI, improves signal-to-noise ratio (SNR), and enhances the performance of communication devices by eliminating inter-symbol interference without increasing power consumption, as demonstrated in various graphs and diagrams showing improved SNDR and ENOB performance.
Implementation Method 1
The resistance value of the equalization element is predetermined based on a delay associated with the segment of the array of inverters
Data Source
AI summary
The present invention relates to data communication techniques and integrated circuit devices. More specifically, embodiments of the present invention provide an input buffer module that utilizes one or more equalization elements. The input buffer module includes an array of inverters arranged in a series. An equalization element is configured in series relative to a segment of the array of inverters. The resistance value of the equalization element is predetermined based on a delay associated with the segment of the array of inverters. There are other embodiments as well.