Hybrid Suppression Circuit for Full-Duplex D2D Links
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Solution Overview
Problem
Existing die-to-die (D2D) communication links in integrated circuits face challenges in achieving high bandwidth while maintaining independent clock frequencies and supply voltages across dies, due to frequency drift and physical circuit parameter variations.
Innovation Solution
The implementation of a bi-directional, single-channel D2D link using suppression circuitry, which allows each die to transmit data at its own clock data rate without requiring clock alignment, and operates at independent supply levels, using a single wire for full duplex communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-channel bidirectional link is used for die-to-die communication, then bandwidth efficiency and wire utilization are improved, but signal interference and difficulty in separating transmitted signals worsen
Solution Approach 1:
A hybrid circuit is introduced as an intermediary component between the transmitter and receiver. This hybrid circuit receives the combined signal from the transmission line and separates it into transmitted and received signal components, effectively acting as a mediator that eliminates direct signal interference while enabling full-duplex communication over a single wire
Solution Approach 2:
The hybrid circuit segments the combined signal into separate transmitted and received signal paths. By dividing the composite signal into distinct components, the system can process each signal separately, preventing interference between simultaneous transmissions in opposite directions
2Ease of operation
If clock frequencies are aligned across dies, then synchronization is simplified, but adaptability to independent operating conditions and frequency drift tolerance worsen
Solution Approach 1:
The system dynamically adapts to different clock frequencies at each die without requiring alignment. The hybrid circuit and signal processing architecture accommodate frequency variations in real-time, allowing each die to operate independently while maintaining communication integrity through flexible frequency tolerance
3Object-affected harmful factors
If separate wires are used for bidirectional communication, then signal interference is reduced, but device complexity and wire count increase
Solution Approach 1:
The system merges the transmit and receive channels into a single physical wire for bidirectional communication. The hybrid circuit enables full-duplex operation on this shared medium by separating the combined signal into distinct transmitted and received components, eliminating the need for separate wires while maintaining signal integrity
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 solution enables efficient, high-bandwidth, full-duplex communication between dies with independent clock frequencies and supply voltages, reducing interference and improving signal clarity by effectively suppressing transmitted signals at the receiver input.
Implementation Method 1
The suppression circuit is coupled to the transmitter driver to suppress the transmitted data at an input of the receiver
Data Source
AI summary
In some embodiments, an interconnect with a plurality of single-ended, bi-directional channels capable of simultaneous bi-directional data transfer is provided. There may be Tx/Rx circuits, each having a suppression circuit, on each side of a channel with each being capable of operating at independent supply levels and clock frequencies.