ADC Timing And Gain Loop Control With Reduced Loop Interaction
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Solution Overview
Problem
Data processing circuits with loops often experience oscillation and improper operation due to interactions between timing and gain loops, leading to instability and sub-optimal performance.
Innovation Solution
The implementation of ADC-based timing and loop gain circuits that limit interaction between timing and gain loops, using a channel model to adjust phase and gain feedback based on digital samples and expected outputs, and employing adaptive feedback updates to stabilize loop operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If timing and gain loops are implemented in data processing circuits, then loop functionality is provided, but loop oscillation and improper operation occur due to interactions between the loops
Solution Approach 1:
The patent segments the timing and gain loops into separate processing paths that operate independently. The timing loop processes phase information while the gain loop processes amplitude information, with each loop having its own feedback path. This segmentation prevents harmful interactions between the loops while maintaining both functionalities, resolving the contradiction between providing loop functionality and maintaining loop stability.
2Adaptability or versatility
If multiple modifiable parameters are adjusted together in loops, then comprehensive control is achieved, but loop oscillation and improper operation result
Solution Approach 1:
The patent implements dynamic adjustment of loop parameters with different update rates. The timing loop and gain loop operate with independent update frequencies, allowing each parameter to be optimized separately. This dynamic approach enables comprehensive parameter control while avoiding the oscillation that would result from synchronized adjustment of multiple parameters, thereby improving loop operation reliability.
3Stability of the object's composition
If ADC-based timing and gain circuits are implemented with limited interaction, then loop stability is enhanced, but circuit complexity increases
Solution Approach 1:
The patent merges the timing and gain processing functions into a unified ADC-based circuit architecture that shares common components such as the analog-to-digital converter, buffer memory, and processing pipeline. By combining these functions in a integrated manner with limited interaction between the timing and gain loops, the patent achieves enhanced loop stability while avoiding excessive circuit complexity that would result from completely separate implementations.
Data Source
AI summary
Various embodiments of the present invention provide circuits, systems and methods for data processing. For example, a data processing circuit is discussed that includes: an analog to digital converter circuit, a target response circuit, and a timing circuit. The analog to digital converter circuit is operable to receive a data input and to provide corresponding digital samples synchronous to a sampling phase. The sampling phase corresponds to a phase feedback. The target response circuit is operable to provide an expected output corresponding to a known input. The timing circuit is operable to generate the phase feedback based at least in part on values derived from the expected output.