TIA Bypass Signal Sensing in Linear Pluggable Optics
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Solution Overview
Problem
Devices with electrical interfaces coupled to optical interfaces via digital signal processors consume excessive power and may include components that do not enhance performance.
Innovation Solution
Eliminating the digital signal processor (DSP) from the device's receive path and using a trans-impedance amplifier (TIA) with an optical interface receiver to sense bypass signals, reducing power consumption and enhancing performance by eliminating unnecessary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a digital signal processor (DSP) is used to couple electrical and optical interfaces, then signal processing capability is improved, but power consumption increases
Solution Approach 1:
The patent extracts and removes the digital signal processor (DSP) from the optical receiver architecture, replacing it with an analog TIA-based solution. This elimination of the DSP component directly reduces power consumption while maintaining essential signal processing functions through the bypass path and optical interface receiver.
Solution Approach 2:
The patent substitutes the digital signal processing system with an analog trans-impedance amplifier (TIA) system. This replacement transitions from a complex digital processing architecture to a simpler analog circuit that achieves similar signal conditioning functions with lower power consumption.
2Reliability
If a digital signal processor (DSP) is used in the receive path, then signal processing is improved, but device complexity increases
Solution Approach 1:
The patent removes the DSP component from the receive path, extracting it from the signal processing chain. This elimination simplifies the device architecture by removing unnecessary digital processing stages while retaining essential signal reception and conditioning functions through the TIA and optical interface receiver.
Solution Approach 2:
The patent merges the functions previously performed by separate DSP and analog components into an integrated TIA-based receive path. The TIA directly processes the optical signal with feedback from the optical interface receiver, combining signal amplification, conditioning, and monitoring functions into a unified analog processing architecture.
3Use of energy by moving object
If unnecessary components are removed to reduce power consumption, then power usage decreases, but functionality may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where the optical interface receiver monitors the bypass signal from the TIA and provides feedback control. This feedback loop ensures that essential signal quality monitoring and adjustment functions are maintained even after removing the DSP, preserving functionality while reducing power consumption.
Solution Approach 2:
The patent designs the TIA and optical interface receiver to perform multiple functions that were previously distributed across separate DSP and analog components. The TIA provides signal amplification and conditioning, while the optical interface receiver performs signal quality monitoring, creating a multi-functional analog processing system that replaces the DSP's various functions.
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
Reduces power usage and enhances device performance by eliminating the DSP, while maintaining functionality through feedback mechanisms for the TIA.
Implementation Method 1
The receive path may include a trans-impedance amplifier (TIA) that may send a bypass signal
Data Source
AI summary
A device may include one or more of a transmit path, a receive path, or an optical interface receiver. The transmit path may include an electrical-optical interface that may receive an electrical signal and send an optical signal. The receive path may include a trans-impedance amplifier (TIA) that may send a bypass signal. The optical interface receiver may be coupled to the receive path. The optical interface receiver may sense the bypass signal.