Multi-Rate Tracking Circuit for Stable Signal Level Convergence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing receiver circuits face challenges in accurately amplifying digital signals compressed during transmission, leading to potential errors due to oscillation around the ideal amplification level, especially when multiple compensation methods are applied simultaneously, resulting in inefficient operation.
Innovation Solution
A multi-rate tracking circuit that uses two counters to vary the amplification level based on voting logic indications, with the magnitude of variation dependent on the second counter's value, allowing for quicker convergence to the ideal level while minimizing overshoot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the amplification level is adjusted using voting logic to reach the ideal level, then the signal amplification accuracy is improved, but the system exhibits oscillation and repeated overshooting around the ideal level
Solution Approach 1:
The patent implements dynamic adjustment of the amplification level by varying the time frame over which compression compensation operates. The system transitions from a static single time-frame approach to a dynamic multi-rate approach where the time frame can be shortened or lengthened based on operational conditions, allowing the system to respond more effectively to changes while maintaining stability
Solution Approach 2:
The patent introduces periodic variation in the compression compensation time frame through the use of multiple counters operating at different rates. This periodic modulation of the compensation window allows the system to systematically explore different amplification levels and converge to the ideal level more reliably, reducing oscillation and overshooting
2Reliability
If the compression compensation operates over a long time frame to avoid interference with inter-symbol interference compensation, then the reliability of signal compensation is improved, but the convergence speed to the ideal amplification level is reduced
Solution Approach 1:
The patent segments the compression compensation operation into multiple time frames with different durations. By dividing the compensation process into shorter periodic intervals rather than using a single long time frame, the system can maintain reliability through systematic sampling while achieving faster convergence to the ideal amplification level
Solution Approach 2:
The system dynamically adjusts the compression compensation time frame based on operational needs. By making the time frame variable rather than fixed, the system can switch between longer time frames for reliability and shorter time frames for faster convergence, optimizing both parameters under different conditions
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A multi-rate tracking circuit with an input for a signal, an output arranged to indicate a current proposed level related to the signal, and voting logic connected to the input, arranged to indicate of a direction of change in the current proposed level. A first counter is connected to the voting logic, and arranged to vary the current proposed level based on the indications received from the voting logic. A second counter is arranged to vary a value based on the indications from the voting logic. The variation of the current proposed level by the first counter is dependent on the value varied by the second counter.