Detector-Mimicking Feedback Loop for Low-Latency Noise Cancellation
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Solution Overview
Problem
Existing data processing circuits experience loop oscillation and improper operation due to latency issues, particularly in low frequency noise correction feedback systems, which can lead to performance degradation or inoperability.
Innovation Solution
The implementation of a low latency loop processing system that includes a data detector circuit, a detector mimicking circuit, and an error calculation circuit, which reduces feedback latency by generating a feedback signal based on the difference between the detected and mimicked outputs, and uses a transition frequency filter to mitigate high-frequency transitions and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional data processing circuits use loops for noise correction, then noise cancellation capability is improved, but feedback latency increases causing loop oscillation and improper operation
Solution Approach 1:
The patent creates a mimicked version of the detector circuit that produces a mimicked output signal. This copy allows the system to generate feedback based on the mimicked output rather than waiting for the actual detector output, thereby reducing feedback latency while maintaining noise correction functionality
Solution Approach 2:
The system performs preliminary processing by generating the mimicked output in advance through the detector mimicking circuit. This preliminary action enables the feedback loop to operate with reduced latency since the mimicked output is available before the actual detector completes its full processing cycle
2Object-affected harmful factors
If multiple modifiable parameters are adjusted together in the loop, then noise correction effectiveness is improved, but loop oscillation occurs
Solution Approach 1:
The patent segments the parameter adjustment process by using separate circuits for different functions: the data detector circuit for primary detection, the detector mimicking circuit for generating feedback signals, and the error calculation circuit for computing differences. This segmentation allows multiple parameters to be adjusted independently rather than simultaneously, preventing loop oscillation
Solution Approach 2:
The error calculation circuit acts as an intermediary that computes the difference between the filtered output and the mimicked output. This intermediary step decouples the direct feedback path, allowing multiple parameters to be adjusted without causing immediate loop oscillation, as the error signal mediates the correction process
Data Source
AI summary
Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is discussed that includes a data detector circuit, a detector mimicking circuit, and an error calculation circuit. The data detector circuit is operable to perform a data detection process on a first signal derived from a data input to yield a detected output. The data mimicking circuit is operable to process a second signal derived from the data input to yield a mimicked output. The error calculation circuit is operable to calculate a difference between the second signal and a third signal derived from the mimicked output to yield a feedback signal. The feedback signal is operable to modify the data input during a subsequent period.