Die-to-Die Data Routing Circuit with Differential Transmitter Pairs
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Solution Overview
Problem
Integrated circuit devices face challenges in reducing size while maintaining data transmission efficiency due to the large number of output pads or contacts required for differential data routing.
Innovation Solution
The implementation of differential transmitter and receiver pairs with output and input resistor dividers and transmission lines, allowing for data transfer between die with a reduced number of connections, utilizing a configuration that enables data transfer at rates greater than 10 Gb/s per channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large number of output pads or contacts are provided to accommodate data transmission, then data transmission capacity is improved, but device size increases
Solution Approach 1:
The patent combines multiple data channels into a single differential pair by using a first transmitter to drive multiple output resistor dividers that feed into a second transmitter. This merging approach allows multiple data streams to be transmitted through fewer physical contacts, reducing the number of pads required while maintaining high data transmission capacity
Solution Approach 2:
The differential transmission system is designed to perform multiple functions: it can transmit differential data signals while also carrying additional data channels through the same physical medium. The output resistor dividers enable a single differential pair to serve multiple data transmission purposes, reducing the overall contact requirements
2Area of stationary object
If the number of die-to-die connections is reduced, then device size is reduced, but data transmission efficiency may be compromised
Solution Approach 1:
The patent changes the electrical parameters of the transmission system by introducing output resistor dividers that transform the signal characteristics. This allows the differential transmission line to carry multiple data channels simultaneously by modulating the differential signals in different ways, maintaining high data transmission efficiency while using fewer physical connections
Solution Approach 2:
The output resistor dividers act as intermediary elements between the first transmitter and the second transmitter. These dividers enable the differential pair to carry multiple data channels by distributing the signal in a way that preserves data integrity while reducing the number of required connections
Data Source
AI summary
A circuit for routing data between die of an integrated circuit is described. The circuit comprises differential transmitter and receiver pairs of different integrated circuit die that are coupled together by differential transmission lines. A separate differential transmitter associated with the first die of the integrated circuit and a separate differential receiver associated with the second die of the integrated circuit are configured to transmit data day way of the differential transmission lines associated with the differential transmitter and receiver pairs.