Common Mode Extraction Circuit for Single-Ended Data Signaling Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As data rates increase in inter-chip communication, crosstalk and switching noise also rise, causing common mode noise to corrupt data in single-ended signaling systems, leading to inefficiencies in data communication.
Innovation Solution
A circuit configuration that extracts a common mode reference signal from a differential clock path using resistors and a capacitor to generate a reference signal, which is then used to reduce or eliminate noise in single-ended data signals by coupling it to the negative input terminal of a receiver component, such as an amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-ended signaling is used for data communication, then device complexity is reduced, but common mode noise corrupts data causing reliability degradation
Solution Approach 1:
The patent introduces a common mode extraction circuit as an intermediary component that extracts common mode noise from the data signal path and routes it to the reference input of the receiver. This mediator separates the noise handling function from the data path, allowing single-ended signaling to maintain its simplicity while achieving noise rejection comparable to differential signaling.
2Productivity
If data rate is increased in inter-chip communication, then productivity is improved, but crosstalk and switching noise increase causing harmful factors to worsen
Solution Approach 1:
The patent implements a feedback mechanism where the common mode extraction circuit continuously monitors the data signal for common mode noise and feeds this extracted noise to the reference input of the receiver. This feedback loop enables the receiver to dynamically compensate for noise that increases with higher data rates, allowing productivity improvement without proportional increase in error rates.
3Reliability
If common mode noise is reduced in single-ended signaling, then reliability is improved, but device complexity increases due to additional noise reduction components
Solution Approach 1:
The patent designs the common mode extraction circuit to serve multiple functions: it extracts common mode noise from the data signal, provides this noise as a reference to the receiver for subtraction, and simultaneously maintains compatibility with existing single-ended signaling infrastructure. This multi-functionality achieves noise reduction without requiring completely separate dedicated noise cancellation systems.
Data Source
AI summary
Systems, apparatuses, and methods for performing common mode extraction for data communication are disclosed. A circuit is configured to receive a single-ended data signal on a first input port and couple the data signal to a positive input terminal of a receiver component. The circuit is also configured to receive a differential clock signal on second and third input ports and generate a reference signal from the differential clock signal. In one embodiment, the reference signal is generated from an average of the differential clock signal. The circuit is configured to couple the reference signal to a negative input terminal of the receiver component. In one embodiment, the receiver component is an amplifier.