Signal Isolation Receiver Wake Control for Low Idle Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Isolation circuits in electronic systems face challenges in reducing common mode noise while maintaining low power consumption, as they often require continuous operation and consume significant energy, especially during periods of no signal transitions.
Innovation Solution
The implementation of an isolation circuit with a wake mode and sleep mode, where the circuit enters a low power state during periods of inactivity, using a wakeup controller to monitor for signal transitions and enable the receiver only when necessary, thereby reducing average power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver operates continuously to ensure data reception capability, then reliability is improved, but power consumption increases
Solution Approach 1:
The receiver dynamically transitions between wake mode and sleep mode based on activity detection. The wakeup controller monitors for transitions on the isolated data line and selectively enables the receiver only when activity is detected, allowing the system to adapt its operational state to actual needs rather than maintaining a fixed continuous operation state
Solution Approach 2:
The system employs periodic monitoring of the data line for transitions and enters periodic sleep periods between active communication events. The receiver is enabled temporarily upon detecting a transition and then returns to sleep mode, creating a rhythm of brief active periods followed by extended idle periods that significantly reduce average power consumption
2Loss of time
If the receiver is enabled during idle periods to maintain readiness, then response time is improved, but power consumption increases
Solution Approach 1:
The wakeup controller continuously monitors the isolated data line for transitions even when the receiver is in sleep mode. This preliminary detection of activity allows the system to prepare for receiver activation in advance, minimizing the actual response time while keeping the receiver itself powered down during idle periods
Solution Approach 2:
The wakeup controller acts as an intermediary between the isolated data line and the power-consuming receiver. It detects transitions on the line and selectively activates the receiver only when needed, serving as a low-power gateway that bridges the always-active communication line and the间歇ically-active receiver
Data Source
AI summary
Described examples include an integrated circuit including a receive portion to receive an encoded transmission on a line. The receive portion has: a wake mode in which the receiver is capable of receiving the encoded transmission; and a sleep mode in which the receiver is not capable of receiving the encoded transmission. A wakeup controller monitors the line for a wakeup signal and provides a signal to the receive portion to cause the receive portion to enter the wake mode when the wakeup controller receives the wakeup signal.