Multi-Protocol Receiver Shared Analog Front-End
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Solution Overview
Problem
Existing communications receivers require new hardware to accommodate different protocols, leading to inefficiencies and increased costs when new protocols are introduced, as they often rely on separate analog front-ends for each protocol rather than a shared solution.
Innovation Solution
A multi-protocol communications receiver with a shared analog front-end that utilizes a variable gain amplifier and a subset of analog-to-digital converter (ADC) circuits operational based on the specific protocol, allowing for efficient switching between protocols like IEEE and Fibre Channel, thereby conserving power and reducing hardware requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate analog front-ends are used for each protocol, then protocol-specific performance is optimized, but device complexity and hardware requirements increase
Solution Approach 1:
The patent implements a universal analog front-end that can process multiple communication protocols (IEEE 802.3 and Fibre Channel) through a single shared infrastructure. The VGA and ADC circuits are designed to be protocol-agnostic, allowing the same hardware to be configured for different protocols through software/firmware control rather than requiring separate dedicated hardware paths.
Solution Approach 2:
The patent merges previously separate analog front-end resources into a single shared pool. Multiple protocol handlers share the same VGA and ADC circuits, eliminating redundant hardware. The system combines protocol-specific processing paths into a unified architecture where resources are dynamically allocated based on the active protocol.
2Productivity
If all ADC circuits remain operational for all protocols, then maximum signal processing capability is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic resource allocation where the number of operational ADC circuits is adjusted based on the active protocol and signal conditions. The system can transition from using all ADC circuits when processing demanding protocols to using only a subset when processing less demanding protocols, enabling adaptive power management that matches actual processing needs.
Solution Approach 2:
The patent changes the operational parameters of the ADC circuits based on protocol requirements. By modifying which ADC circuits are enabled and their sampling rates according to the active protocol's demands, the system optimizes the balance between processing capability and power consumption, avoiding the constant high-power state that would result from keeping all circuits operational at maximum capacity.
3Adaptability or versatility
If new protocols are accommodated by developing new chips, then protocol compatibility is ensured, but manufacturing costs and device complexity increase
Solution Approach 1:
The patent creates a universal receiver platform that can accommodate multiple communication protocols including IEEE 802.3 and Fibre Channel through a single chip design. The analog front-end and ADC resources are designed to be protocol-agnostic, allowing new protocols to be supported through software/firmware updates rather than requiring new hardware chips, thereby reducing manufacturing complexity and costs.
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AI summary
According to an example embodiment, a communications receiver may include a variable gain amplifier (VGA) configured to amplify received signals, a VGA controller configured to control the VGA, a plurality of analog to digital converter (ADC) circuits coupled to an output of the VGA, wherein the plurality of ADC circuits are operational when the communications receiver is configured to process signals of a first communications protocol, and wherein only a subset of the ADC circuits are operational when the communications receiver is configured to process signals of a second communications protocol.