High Bit Rate Interface Common Mode Voltage Adjustment
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Solution Overview
Problem
Current data communication interfaces struggle to handle high-speed data transfer between devices operating at different common mode voltages, particularly for high bit rate communication exceeding 12 GHz, as existing solutions fail to effectively adjust common mode voltage levels for seamless communication.
Innovation Solution
A data communication apparatus and method that splits input signals into high and low frequency components, using a passive circuit to pass the high frequency component and an active circuit to adjust the low frequency component's common mode voltage, allowing for the combination and transmission of these components at a different common mode voltage suitable for the receiving device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional communication interface is used to transmit high-speed data signals, then data transfer speed can be maintained, but common mode voltage mismatch between devices causes signal integrity degradation and communication failures
Solution Approach 1:
The patent segments the signal transmission path into two independent channels: a passive circuit channel for high-frequency components and an active circuit channel for low-frequency components. This segmentation allows each channel to be optimized independently - the passive channel maintains signal integrity for high-speed data while the active channel adjusts common mode voltage levels to ensure compatibility between devices with different voltage requirements.
Solution Approach 2:
The patent introduces an intermediary active circuit stage between the transmitter and receiver that mediates the common mode voltage mismatch. This intermediary circuit receives the differential signal, adjusts its common mode voltage level to match the receiver's requirements, and then passes the signal along. This mediator enables communication between devices with different common mode voltage specifications without degrading signal integrity.
2Adaptability or versatility
If common mode voltage adjustment is implemented using traditional active circuits, then voltage level matching is achieved, but high-frequency signal integrity is degraded due to circuit complexity and parasitic effects
Solution Approach 1:
The patent divides the signal spectrum into high-frequency and low-frequency components and routes them through different circuit paths. The high-frequency component passes through a simple passive circuit that preserves signal integrity, while the low-frequency component passes through the active common mode voltage adjustment circuit. This segmentation prevents the active circuit from degrading high-frequency signals while still achieving voltage level matching.
Solution Approach 2:
The patent applies different circuit characteristics to different frequency components of the signal. The passive circuit path is optimized for high-frequency signal transmission with minimal interference, while the active circuit path is optimized for low-frequency common mode voltage adjustment. Each part of the system has qualities locally optimized for its specific function, preventing overall system degradation.
3Reliability
If a passive circuit is used to transmit high-frequency signals, then signal integrity is maintained, but common mode voltage adjustment capability is lost
Solution Approach 1:
The patent merges two separate circuit paths - a passive high-frequency signal path and an active common mode voltage adjustment path - into a single integrated communication interface. The passive path maintains signal integrity for high-speed data transmission, while the active path provides common mode voltage adjustment capability. By combining these two paths in parallel and recombining their outputs, the system achieves both signal integrity and voltage adaptability simultaneously.
Data Source
AI summary
Various apparatuses, systems, methods, and media are disclosed to provide wired communication interface with common mode voltage adjustment for high bit rate communication between devices. In one example, a high speed data communication interface can split the input signal into a high frequency component and a low frequency component. The high speed data communication interface can adjust the common mode voltage using the low frequency component and combine the high frequency component and the low frequency component by superposition after adjusting the common mode voltage.