Asymmetric Voltage Swing Interface for Controller-Memory Links
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Solution Overview
Problem
The electrical interface between integrated circuits, particularly between a controller and memory elements, remains a significant limiting factor for memory performance due to differences in semiconductor technology, threshold voltages, and packaging technologies, leading to inefficient power consumption and communication challenges in high-speed link designs.
Innovation Solution
Implementing an asymmetric voltage swing interface where the controller transmits with a higher voltage swing than the memory, optimizing power efficiency by leveraging the controller's faster technology and lower threshold voltages, while reducing power dissipation by lowering the voltage swing from memory to controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If symmetric voltage swing is used in both transmitters, then circuit design is simplified, but power consumption increases and communication reliability decreases due to mismatched receiver sensitivities
Solution Approach 1:
The patent applies asymmetry by configuring the first transmitter with a first voltage swing and the second transmitter with a second voltage swing that is different from the first voltage swing. This asymmetric voltage swing configuration optimizes power consumption and matches the different sensitivity requirements of the receivers, resolving the contradiction between design simplicity and power efficiency.
Solution Approach 2:
The patent implements local quality by allowing each transmitter to operate with different voltage swings tailored to its specific communication channel and receiver requirements. The first transmitter uses a first voltage swing optimized for its channel, while the second transmitter uses a second voltage swing optimized for its channel, enabling localized optimization without affecting the entire system architecture.
2Reliability
If higher voltage swing is used to improve signal transmission, then communication reliability improves, but power consumption increases
Solution Approach 1:
The patent changes the voltage swing parameter differently for each transmitter based on their specific communication requirements. By adjusting the voltage swing parameter locally rather than uniformly across the system, the patent achieves reliable communication for each channel while minimizing overall power consumption through optimized parameter selection.
3Use of energy by moving object
If different voltage swings are used for different transmitters, then power efficiency and communication reliability improve, but device complexity increases
Solution Approach 1:
The patent introduces dynamics by making the voltage swing configuration adaptable to different communication channels and receivers. The system can dynamically select appropriate voltage swing values for each transmitter based on channel characteristics and receiver sensitivity, enabling power-efficient operation without requiring complex manual configuration.
Data Source
AI summary
Embodiments of the invention are generally directed to interfacing between integrated circuits with asymmetric voltage swing. An embodiment of an apparatus includes a first integrated circuit including a first transmitter and a first receiver; a second integrated circuit including a second transmitter and a second receiver; and an interface including communication channel linking the first transmitter with the second receiver and the first receiver with the second transmitter, wherein the communication channel is one of a single channel or a dual channel. The first transmitter is operable to transmit a first signal and the second transmitter is operable to transmit a second signal, a first average voltage swing of the first signal being asymmetric with a second average voltage swing of the second signal.