Wire Signal Recoding to Cut Capacitive Switching Power
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Solution Overview
Problem
There is a need to reduce the power required to send signals over wires, particularly in scenarios where multiple wires are close together, as existing technologies consume significant power due to capacitance recharging events during signal switching.
Innovation Solution
A method and apparatus that encode signals based on previously received signals to minimize power consumption, using an encoder to determine and apply encoding schemes that reduce capacitance recharging events, thereby lowering the power needed to send signals over wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If signals are sent over wires without encoding optimization, then signal transmission is simple and fast, but power consumption is high due to capacitance recharging events
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting signal encoding parameters based on the transition patterns of previously transmitted signals. The encoder modifies encoding parameters in real-time to minimize capacitance recharging events, thereby reducing power consumption while adapting to the specific signal transmission context.
Solution Approach 2:
The patent implements feedback by using information about previously transmitted signals to inform current encoding decisions. The encoder receives feedback about signal transition history and uses this feedback to select encoding schemes that reduce power consumption, creating a closed-loop control system for power optimization.
2Area of stationary object
If wires are placed close together to increase density, then area utilization improves, but power consumption increases due to increased capacitance coupling
Solution Approach 1:
The patent addresses this contradiction by dynamically changing encoding parameters to compensate for the increased capacitance coupling caused by dense wire routing. The encoder adjusts its operation based on the physical proximity of wires, modifying signal transitions to minimize the impact of capacitive coupling and reduce power consumption in high-density routing scenarios.
3Productivity
If signal switching speed is increased to improve performance, then productivity improves, but power consumption increases due to more frequent capacitance recharging
Solution Approach 1:
The patent applies periodic action by optimizing signal transitions to occur in patterns that minimize capacitance recharging events. Rather than simply increasing switching speed, the encoder introduces intelligent timing patterns that allow signals to switch at optimal moments, reducing the frequency of high-power recharging events while maintaining overall transmission speed.
Solution Approach 2:
The patent uses parameter changes to dynamically adjust signal transition characteristics based on the transmission history. By modifying encoding parameters in response to previous signal states, the system can maintain high switching speeds while reducing the number of transitions that require full capacitance recharging, thereby lowering power consumption.
Data Source
AI summary
Methods and apparatus are described. A method, implemented in a decoder, includes receiving two or more signals from an encoder over two or more respective wires. At least one of the two or more signals includes at least one code that was recoded by the encoder. The decoder receives a recoding table. The recoding table provides a mapping indicating the recoding for each code that was recoded by the encoder in the received two or more signals. The decoder decodes the two or more received signals using the received recoding table.