In regards to this Teardown Tuesday article:
http://www.allaboutcircuits.com/news/teardown-tuesday-backup-sensors/
The piezo transducer both sends the initial signal and receives the reflection using only 2 wires. So the output signal generator, and the reflection processing circuitry must be directly connected. On the signal processing side of things; how is this device separating the initial signal from the reflection, so that only the reflection is amplified and evaluated? Is there some clock based synchronization, or is it all level based?
Edit --> The more I think about it, it must send a signal then pause and listen for x-time for a reflection to come back, then repeat. My question stemmed from a past request to help someone make these sensors wireless while keeping the sensing hardware intact, and I stumbled on how to make that possible.
http://www.allaboutcircuits.com/news/teardown-tuesday-backup-sensors/
The piezo transducer both sends the initial signal and receives the reflection using only 2 wires. So the output signal generator, and the reflection processing circuitry must be directly connected. On the signal processing side of things; how is this device separating the initial signal from the reflection, so that only the reflection is amplified and evaluated? Is there some clock based synchronization, or is it all level based?
Edit --> The more I think about it, it must send a signal then pause and listen for x-time for a reflection to come back, then repeat. My question stemmed from a past request to help someone make these sensors wireless while keeping the sensing hardware intact, and I stumbled on how to make that possible.
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