Differential Communication Circuit Ringing Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current differential communication circuits consume unnecessary power and face challenges in maintaining stable signal level determination due to ringing issues, which can lead to false signal level thresholds.
Innovation Solution
The proposed differential communication circuit employs a configuration with first and second switches, third and fourth switches, and corresponding driver circuits, where the third and fourth switches are turned ON for a shorter period than the OFF period of the first and second switches, generating a negative potential difference to dampen ringing and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the third and fourth switches are turned ON during the entire OFF period of the first and second switches, then a negative potential difference is maintained to prevent over-threshold signal levels, but power consumption increases
Solution Approach 1:
The third and fourth switches are turned ON periodically only during the initial phase when ringing occurs, rather than continuously during the entire OFF period. This periodic activation maintains the negative potential difference when needed to prevent false signal level detection, while turning them OFF after the ringing attenuates to reduce unnecessary power consumption.
Solution Approach 2:
The patent dynamically adjusts the state of the third and fourth switches based on the ringing condition. The switches are activated when ringing is detected and deactivated when ringing attenuates, allowing the circuit to adapt its behavior in real-time. This dynamic control ensures reliable signal level determination during critical periods while minimizing power consumption during stable periods.
2Object-affected harmful factors
If the third and fourth switches are turned ON for a long period, then ringing is effectively damped, but power consumption increases unnecessarily
Solution Approach 1:
The third and fourth switches are turned ON only for the necessary duration to dampen the ringing effect, which occurs immediately after the first and second switches are turned OFF. Once the ringing attenuates, the switches are turned OFF, avoiding unnecessary energy consumption during periods when ringing is no longer present.
Solution Approach 2:
The circuit uses the natural attenuation of ringing to determine when to turn off the third and fourth switches. The ringing itself provides the signal that the switches should be deactivated, as the attenuation of ringing indicates that the harmful effect has been sufficiently addressed without requiring external intervention.
Data Source
AI summary
A differential communication circuit includes: a first switch in between a signal line and a power source, a second switch in between a signal line and a ground, a third switch in between the signal line and the ground, a fourth switch in between the signal line and the power source, first and second drivers respectively driving the first and second switches, and third and fourth drivers respectively driving the third and fourth switches OFF to ON at an ON to OFF timing of the first and second switches, for setting an ON period of the third and fourth switches to be shorter than a one-bit width in a communication signal and enabling a stable signal level determination while reducing power consumption of the differential communication circuit.