•Can the CN0343 cct be tweaked to get from 10cm to 5m distance? CN0343 reference design soln shows 50cm min
•Can the blanking time be cut down to 1/5.
Hi VicZ: the minimum distance of CN0343 can measured is depend on the transceiver damping character and circuit design, the following way can help to reduce the minimum measuring distance:
For 10cm~5cm applications, the echo back time is: 588us ~ 294us(ultrasound travel 20cm ~ 10cm, sound speed appropriate 340m/s), the 40kHz ultrasound period is 25us, you need to make your system available for echo within 10 cycles.
The CN0343 can't working on this short distance without modify.
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