Buffer Equalization Delay Compensation for ISI Noise Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In semiconductor apparatuses, intersymbol interference (ISI) during signal transmission leads to deteriorated signal transmission efficiency, particularly due to noise such as tail ISI, which affects input signal sensing performance.
Innovation Solution
A buffer with an equalization function is implemented, utilizing an IIR filter and an equalization delay compensation unit to generate delay-compensated equalization control signals, which primarily and secondarily remove noise from input signals, effectively addressing ISI and its residual components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an input buffer with equalization function is used to overcome ISI, then signal transmission efficiency is improved, but device complexity increases due to additional equalization control circuits
Solution Approach 1:
The buffer is divided into multiple functional units: a first sensing unit for sensing data, a second sensing unit for generating equalization control signals, an equalization delay compensation unit for compensating signal processing delays, and a noise removal unit for removing noise. This segmentation allows each unit to perform a specific function, improving signal transmission efficiency while managing complexity through modular design.
Solution Approach 2:
The equalization delay compensation unit compensates for signal processing delays in advance by generating delay-compensated equalization control signals before they are used in the noise removal process. This preliminary action ensures that the equalization control signals are properly synchronized, improving signal transmission efficiency without requiring complex real-time adjustment mechanisms.
2Object-affected harmful factors
If noise removal is performed according to equalization control signals without delay compensation, then noise removal capability is provided, but signal processing accuracy deteriorates due to timing misalignment
Solution Approach 1:
The equalization delay compensation unit performs preliminary compensation for signal processing delays by generating delay-compensated equalization control signals before they are applied in the noise removal unit. This ensures that the timing alignment is corrected in advance, maintaining both noise removal capability and signal processing accuracy.
Solution Approach 2:
The second sensing unit generates equalization control signals based on the output of the first sensing unit, creating a feedback mechanism. The equalization delay compensation unit then compensates for delays in these feedback signals, ensuring that the noise removal process uses accurately timed control signals, thereby maintaining signal processing accuracy while effectively removing noise.
3Measurement precision
If delay compensation is implemented for equalization control signals, then signal processing accuracy is improved, but device complexity increases due to additional delay compensation circuits
Solution Approach 1:
The buffer is segmented into functional units, with the equalization delay compensation unit being a distinct module that specifically handles delay compensation. This segmentation isolates the complexity of delay compensation to a dedicated unit, improving signal processing accuracy while managing overall device complexity through modular architecture.
Solution Approach 2:
The equalization delay compensation unit serves multiple purposes: it compensates for signal processing delays, generates delay-compensated equalization control signals, and ensures proper timing alignment for the noise removal process. This multi-functionality reduces the need for separate circuits, thereby improving signal processing accuracy without proportionally increasing device complexity.
Data Source
AI summary
A buffer may include a first sensing unit configured to sense data, and a second sensing unit configured to generate equalization control signals according to outputs of the first sensing unit. The buffer may include an equalization delay compensation unit configured to compensate the equalization control signals for signal processing delay times of the equalization control signals, and generate delay-compensated equalization control signals. The buffer may include a noise removal unit configured to primarily remove noise of the output signals of the first sensing unit according to the equalization control signals, and secondarily remove noise of the output signals of the first sensing unit according to the delay-compensated equalization control signals.