Optic Signal Receiver Dynamic Gain Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical signal receivers face challenges in accurately processing and amplifying signals due to varying power levels caused by factors like laser output variations, fiber attenuation, and photodetector efficiency, leading to compromised bit error rates and performance at different input power levels.
Innovation Solution
A dynamic adjustment method for optic signal receivers, where system settings such as transimpedance amplifier gain, variable gain amplifier settings, and voltage regulator levels are adjusted based on the power level of the received electrical signal, using a processor to evaluate signal thresholds and retrieve corresponding settings from memory to optimize operation across a range of input power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed TIA gain is used, then circuit design is simple, but performance is compromised at different input power levels
Solution Approach 1:
The patent implements dynamic adjustment of TIA gain based on received signal power levels. The system transitions from a static fixed gain design to a dynamic adaptive design where the gain is automatically adjusted according to the input signal strength, resolving the contradiction between circuit simplicity and performance reliability across varying power conditions.
Solution Approach 2:
The patent changes the TIA gain parameter dynamically based on received signal power. By monitoring the input power level and adjusting the gain parameter accordingly, the system optimizes performance for both high and low power signals, eliminating the need for a compromise fixed gain setting.
2Reliability
If TIA gain is increased for low power signals, then low power signal performance improves, but high power signals become overloaded
Solution Approach 1:
The patent dynamically changes the TIA gain parameter based on the detected signal power level. When low power signals are detected, the gain is increased to improve performance; when high power signals are detected, the gain is reduced to prevent overload. This adaptive parameter adjustment resolves the contradiction between optimizing for low power and avoiding high power saturation.
Solution Approach 2:
The patent implements a feedback mechanism where the received signal power is monitored and used to control the TIA gain setting. This closed-loop control ensures that the gain is automatically adjusted to match the input signal conditions, preventing both under-amplification of weak signals and over-amplification of strong signals.
3Object-affected harmful factors
If TIA gain is decreased for high power signals, then signal overload is prevented, but low power signals are not amplified sufficiently
Solution Approach 1:
The patent dynamically adjusts the TIA gain parameter based on the detected signal power level. When high power signals are detected, the gain is decreased to prevent saturation; when low power signals are detected, the gain is increased to ensure sufficient amplification. This adaptive approach resolves the contradiction between protecting against high power saturation and ensuring adequate amplification of low power signals.
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
This approach improves bit error rate performance across a wider range of input power levels, reducing errors at both high and low power extremes and optimizing circuit parameters for specific power levels, resulting in enhanced signal processing and reduced bit error rates.
Implementation Method 1
converting the optic signal to an electrical signal
Data Source
AI summary
A system and method for controlling optical receiver operation in response to a received optic signal power level that includes providing an optic signal receiver having operation determined by one or more system settings. During operation, the optic signal is received and converted to an electrical signal. The electrical signal is evaluated to determine a power level of the electrical signal. Responsive to the power level of the electrical signal exceeding a first predetermined threshold, adjusting a first system setting and responsive to the power level of the received electrical signal decreasing below a second predetermined threshold, adjusting the first system setting. Then, responsive to the power level of the received electrical signal exceeding a third predetermined threshold, adjusting a second system setting and responsive to the power level of the received electrical signal decreasing below a fourth predetermined threshold, adjusting the second system setting.