Data Receiving Circuit with Adaptive Reference Signal Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current equalizers in data receiving circuits have limited ability to adjust data signals, leading to inaccuracies due to intersymbol interference and differences between data and reference signal levels, affecting signal quality.
Innovation Solution
A data receiving circuit with a first and second amplifier module performs comparisons using different reference signals to generate signal pairs with greater level differences, allowing the second amplifier module to select the pair with the greater difference for improved accuracy and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single reference signal is used for comparison, then the circuit structure is simple, but the ability to adjust data signals with different level values is limited
Solution Approach 1:
The patent divides the single comparison function into multiple comparison operations using different reference signals. The first amplifier module performs multiple comparisons by segmenting the reference signal into different level values, allowing the circuit to handle data signals with varying level values more effectively.
Solution Approach 2:
The patent changes the parameter of reference signal level values to improve adaptability. By using first and second reference signals with different level values, the system can adjust to data signals having different amplitude characteristics, thereby resolving the contradiction between adaptability and complexity.
2Reliability
If continuous time linear equalizer or decision feedback equalizer is used, then channel compensation is achieved, but the adjustment ability for data signals remains limited
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the selection between different reference signals based on the characteristics of incoming data signals. This dynamic approach enables the equalizer to adapt its comparison parameters in real-time, improving both signal accuracy and adjustment ability simultaneously.
Solution Approach 2:
The patent employs feedback mechanisms where the output of the first amplifier module feeds into the second amplifier module. This feedback loop allows the system to continuously refine signal accuracy by using the results of initial comparisons to guide subsequent comparison operations with different reference signals.
3Measurement precision
If data signal level values are close to reference signal level values, then the comparison is straightforward, but determination accuracy deteriorates due to intersymbol interference
Solution Approach 1:
The patent addresses intersymbol interference by changing the reference signal parameters (level values) to create greater separation between signal levels. By using multiple reference signals with different level values, the system can determine data signal levels more accurately even when intersymbol interference causes level values to be close together.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Embodiments provide a data receiving circuit, a data receiving system, and a memory device. The data receiving circuit includes a first amplifier module and a second amplifier module. The first amplifier module is configured to receive a data signal, a first reference signal and a second reference signal, perform a first comparison between the data signal and the first reference signal and output a first signal pair, and perform a second comparison between the data signal and the second reference signal and output a second signal pair. The second amplifier module is configured to select to receive the first signal pair or the second signal pair as input signal pairs based on a feedback signal, amplify a voltage difference between the input signal pairs, and output a first output signal and a second output signal, wherein the feedback signal is obtained based on previously received data. Embodiments are at least beneficial to improving receiving performance of the data receiving circuit.