Transceiver Power Supply Segmentation for Noise Isolation
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Solution Overview
Problem
High-speed serial data communication systems face challenges in noise contamination between power supply signals, particularly in integrating transceivers into programmable logic devices, where separate power supplies for each noise-sensitive component lead to a large number of required supplies, making the system impractical for high-channel count applications.
Innovation Solution
The implementation of a multi-power supply system where each transceiver channel has separate power supplies for the receiver path, transmitter path, transmitter driver, and an additional supply for sensitive components, with shared regulators and ferrite beads to minimize noise and reduce the number of individual power supplies by allowing power sharing between channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separate power supplies are provided for each noise-sensitive component, then noise contamination is minimized, but the number of power supplies becomes unacceptably large
Solution Approach 1:
The patent segments the power supply system into distinct groups: a first power supply for receiver path components, a second power supply for transmitter path components (excluding driver), and a third power supply for the transmitter driver. This segmentation isolates noise sources while reducing the total number of separate power supplies compared to individual supplies for each component.
Solution Approach 2:
The patent merges power supply functions by allowing multiple transceiver channels to share common power supplies where appropriate. For example, multiple channels can share the first power supply for receiver path components, reducing the overall number of power supplies needed while maintaining noise isolation through strategic separation of transmitter and receiver supplies.
2Object-affected harmful factors
If separate power supplies are provided for PLD logic and transceiver components, then noise isolation is improved, but device complexity increases
Solution Approach 1:
The patent clearly segments power supplies into three distinct groups: PLD logic power supply, transceiver receiver path power supply, and transceiver transmitter driver power supply. This segmentation provides noise isolation between different functional blocks while maintaining a manageable power supply configuration.
Solution Approach 2:
The patent introduces separate power supply rails as intermediaries between different functional blocks. By providing distinct power rails for PLD logic and transceiver components, the system isolates noise without requiring complex filtering or shielding mechanisms.
Data Source
AI summary
The various components of transceiver circuitry on an integrated circuit are put together in various ways for purposes of being supplied with power to help prevent noise propagation between the groups. In the case of multi-channel transceiver circuitry there can be various amounts of power supply sharing between similar groups in multiple channels.