Threshold-Based Signal Switch to Prevent Audio Pops
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Solution Overview
Problem
Switching between signals at different potentials often results in undesirable effects such as audio pops, visual distortions, or sudden current spikes, which existing technologies fail to adequately mitigate.
Innovation Solution
A switch configuration that delays state changes until the signals reach a threshold, using shift circuits and attenuators to ensure minimal difference between input and output signals, thereby reducing adverse effects like audio pops and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If switching between signals at different potentials is performed immediately, then switching speed is improved, but harmful effects such as audio pops and current spikes occur
Solution Approach 1:
The control circuit performs preliminary assessment by comparing the potential levels of first and second signals before executing the switch state change. This preliminary action ensures that switching only occurs when signals are at similar potentials, preventing audio pops and current spikes while maintaining efficient switching operation
2Object-affected harmful factors
If switch state change is delayed until signal threshold is reached, then harmful effects are reduced, but switching time increases
Solution Approach 1:
The control circuit continuously monitors and compares the potential levels of both signals, using this feedback information to determine the optimal switching moment. This feedback mechanism ensures switching occurs at the precise moment when potentials are matched, minimizing delay while preventing harmful effects
3Measurement precision
If continuous monitoring of signal potentials is performed, then switching precision is improved, but power consumption increases
Solution Approach 1:
The control circuit performs periodic comparison of signal potentials rather than continuous monitoring, assessing signals at regular intervals sufficient to capture threshold crossing events. This periodic action maintains measurement precision for detecting when potentials match while significantly reducing power consumption compared to continuous monitoring
Data Source
AI summary
A switch can be configured to receive a first signal at a first input and provide an output signal at an output, depending on a state of the switch. A switch state change can be delayed until an indication of a requested switch state different than a current switch state is received and the first signal reaches a threshold.