OTN Optical Receiver Chip With Integrated TIA for Low-Loss Data Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical receiver chips for short-distance data transmission in data centers face high power consumption and significant signal attenuation due to external TIA placement, which increases manufacturing costs and reduces data transmission quality.
Innovation Solution
An optical receiver chip integrating a 28 Gbps TIA and LA within the RX chip, with built-in CDR and digital control units, reduces power consumption and signal attenuation by enabling DC coupling and flexible signal path selection, and includes a power management module to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the TIA is arranged outside the chip, then the chip can be simpler in structure, but the power consumption increases and signal attenuation becomes serious
Solution Approach 1:
The patent integrates the TIA module inside the RX chip, merging previously separate components (TIA external to chip) into a unified integrated structure. This integration eliminates the need for external driver stages and reduces PCB signal paths, thereby reducing power consumption and signal attenuation while maintaining manageable chip complexity through modular internal architecture.
2Ease of manufacture
If the TIA is arranged outside the chip, then the chip manufacturing cost can be reduced, but the signal attenuation on PCB board becomes serious
Solution Approach 1:
By integrating the TIA module within the RX chip, the patent eliminates long PCB signal paths that cause attenuation. The merged internal architecture allows direct coupling between photodiode and TIA, reducing signal degradation while the standardized chip package maintains manufacturing efficiency.
3Device complexity
If the TIA is arranged outside the chip, then the chip design can be simpler, but the overall system power consumption increases
Solution Approach 1:
The integration of TIA inside the RX chip merges previously separate functional blocks into a cohesive unit. This eliminates the need for external driver stages and reduces interconnection losses, thereby reducing overall system power consumption while the internal modular design keeps the chip architecture manageable and systematic.
4Ease of manufacture
If external TIA is used, then the chip packaging can be simpler, but the cost of use increases
Solution Approach 1:
The patent integrates the TIA module within the RX chip, merging external components into the chip package itself. This integration reduces the need for additional external components and complex PCB routing, simplifying the overall packaging while reducing operational costs through lower power consumption and eliminated driver stage requirements.
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
The integrated design reduces power consumption, minimizes signal attenuation, and enhances data transmission quality while meeting strict power and cost requirements for data centers, offering a competitive solution in terms of performance, area, and power efficiency.
Implementation Method 1
the photodiode PD converts the received optical signal into a current
Implementation Method 2
the TIA (transimpedance amplifier) converts the received weak optical signal into an electrical signal and amplifies the signal
Data Source
AI summary
An optical receiver chip based on OTN transmission technology to solve the high power consumption and serous signal attenuation problems for data transmission below 100 m in the data center includes a receiver, a digital control unit, and a power module. The receiver includes a 28G transimpedance amplifier and a limiting amplifier, converts a weak optical signal into an electrical signal, process a two-stage amplification, and output the signal in a limited state. The signal is then processed by a photodiode into a DC current RSSI, and judged by the internal received signal strength indicator module or the internal optical modulation amplitude loss of signal module of the limiting amplifier. If the signal does not meet the protocol requirements, the output buffer with de-emphasis and the linear equalizer are turned off, and the judgment result is transmitted to the host computer outside the chip simultaneously.