Transmitter Pre-Compensation for Inter-Channel Crosstalk
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Solution Overview
Problem
Existing high-speed transmitter circuits face challenges in effectively attenuating inter-channel interference, which deteriorates signal quality and is difficult to control with conventional methods, particularly in high-bandwidth stacked memory systems.
Innovation Solution
An inter-channel interference attenuation circuit system is implemented at the transmitting end, comprising interference attenuation circuit modules connected to each channel, which adjust output signals based on adjacent channels' data transitions using encoder input signals and switching elements to cancel or attenuate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional inter-channel interference attenuation methods are used, then interference attenuation can be achieved, but power consumption and circuit area increase significantly
Solution Approach 1:
The patent applies preliminary action by performing interference attenuation at the transmitting end before data is sent through the channel. The interference attenuation circuit modifies the output signal of the victim channel based on detected transitions in adjacent aggressive channels, proactively compensating for expected interference rather than reacting to it afterward. This pre-compensation approach reduces the need for complex post-processing and lowers overall power consumption.
Solution Approach 2:
The interference attenuation circuit utilizes the transitions in adjacent channels (aggressive channels) to generate control signals for attenuating interference in the victim channel. The system leverages the existing data transmission activity in neighboring channels to automatically adjust the victim channel's output, eliminating the need for separate monitoring circuits or external control signals, thereby reducing power consumption and circuit area.
2Object-affected harmful factors
If conventional inter-channel interference attenuation methods are used, then interference attenuation can be achieved, but circuit area increases significantly
Solution Approach 1:
The patent merges the interference attenuation function with the existing channel driver circuitry. The interference attenuation circuit shares common components such as the output buffer and control logic with the normal data transmission path, integrating multiple functions into a unified circuit structure. This consolidation eliminates the need for separate dedicated attenuation circuits, significantly reducing the overall circuit area while maintaining effective interference compensation.
Solution Approach 2:
The circuit uses the transitions in adjacent channels to automatically generate control signals for interference attenuation, eliminating the need for separate monitoring circuits or external control mechanisms. This self-regulating approach reduces the number of discrete components required, thereby minimizing circuit area while maintaining effective interference attenuation capability.
3Productivity
If high-speed data transmission is implemented, then data processing performance improves, but inter-channel interference increases
Solution Approach 1:
The patent applies preliminary anti-action by detecting transitions in adjacent aggressive channels and using this information to pre-compensate for expected interference in the victim channel. The interference attenuation circuit generates control signals based on the transitions in aggressive channels before the interference occurs, actively counteracting the harmful effects of high-speed data transmission-induced crosstalk rather than reacting to it afterward.
Solution Approach 2:
The system implements feedback by continuously monitoring transitions in adjacent channels and using this information to dynamically adjust the output signal of the victim channel. The interference attenuation circuit receives transition information from aggressive channels and feeds it back to modify the victim channel's output signal, creating a closed-loop system that adapts to real-time interference conditions to maintain high-speed data processing performance.
Data Source
AI summary
Disclosed is an inter-channel interference attenuation circuit system, which includes a plurality of channels provided between a memory and a processor and that transmits data received from the memory to the processor, and an interference attenuation circuit module connected one by one to each of the channels, and each of the channels is, a victim channel with respect to the connected interference attenuation circuit module, and an aggressive channel with respect to an adjacent interference attenuation circuit module, which is an interference attenuation circuit module connected to an adjacent channel which is interfered with by its own data transmission, and each of the interference attenuation circuit modules, adjusts an output signal of the connected victim channel based on the interference attenuation circuit module and the number of adjacent channels.