Multichannel Signal Processing Circuit Sleep Mode Control
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Solution Overview
Problem
Multichannel signal processing circuits face high power consumption due to continuous operation, even when input signals are inactive, leading to inefficiencies in power management and potential noise issues during state transitions.
Innovation Solution
Implementing a sleep mode mechanism where a secondary channel monitors input signals for activity, using a low-power secondary channel and controller to detect signal activity and trigger wake events, allowing the processor and input channel array to enter active mode only when necessary, thereby reducing overall system power consumption and preventing noise during state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processor and input channel array operate continuously to ensure real-time signal processing capability, then processing reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically transitions between active and sleep modes based on signal activity detection. The processor and input channel array switch from continuous operation to a low-power state when no signal is detected, and wake up when signal activity is detected, making the operational state adaptive rather than static.
Solution Approach 2:
A secondary channel continuously monitors input signals for activity before the main processor needs to wake up. This preliminary detection mechanism allows the system to prepare for wake-up events in advance, ensuring rapid response while maintaining power savings during inactive periods.
2Loss of energy
If the processor and input channel array enter sleep mode to reduce power consumption, then power efficiency is improved, but signal processing responsiveness deteriorates
Solution Approach 1:
The secondary channel performs preliminary monitoring of input signals during sleep mode, detecting signal activity before the main processor needs to respond. This advance detection eliminates the delay that would otherwise occur when transitioning from sleep to active state, maintaining responsiveness while preserving power efficiency.
Solution Approach 2:
The secondary channel acts as an intermediary between the external signal environment and the main processor. It continuously monitors the input signals during sleep mode and triggers processor wake-up when signal activity is detected, bridging the gap between power-saving state and rapid response requirement.
3Measurement precision
If a secondary channel continuously monitors input signals during sleep mode, then wake-up detection accuracy is improved, but power consumption increases
Solution Approach 1:
Instead of having the full processor continuously monitor signals, only a simplified secondary channel performs partial monitoring functionality during sleep mode. This partial action provides sufficient wake-up detection accuracy while consuming significantly less power than full processor operation.
Solution Approach 2:
The secondary channel is designed as a low-cost, simplified monitoring mechanism compared to the full processor. It performs the essential function of detecting signal activity to trigger wake-up, accepting that it has limited capabilities but sufficient for its specific purpose of accurate yet low-power monitoring.
Data Source
AI summary
A circuit includes an input channel array that includes a plurality of channels to receive a plurality of input signals and generate a plurality of channel output signals. A processor to processes the plurality of channel output signals from the input channel array. The processor and the input channel array are configured to operate in a sleep mode when all of the analog input signals are inactive or an active mode when at least one of the analog input signals is active. A secondary channel samples the plurality of input signals and generates a secondary output signal indicative of activity for at least one of the input signals. A secondary channel detector determines a level of signal activity for any of the input signals during the sleep mode based on the secondary output signal.