Hi there,
I'm trying to use a LM324n as a comparator but can't see to get it to work to my understanding. Im using two non-inverting op-amps to amply a signal from a ultrasonic receiver. There's some slight crosstalk between the Tx and Rx so in order to clean up the Rx signal I'm using a comparator. On my I'm applying 0.8V at the inverting terminal of the comparator and the amplified Rx signal to the non-inverting terminal. On my understanding every time the Rx signal is over 0.8V the comparator should output a signal close to the supplied voltage of 5V and ground when under 0.8 V? I have attached two oscilloscope traces, one from when there is no object in front of the Tx and Rx and one when there is an object placed.
I'm trying to use a LM324n as a comparator but can't see to get it to work to my understanding. Im using two non-inverting op-amps to amply a signal from a ultrasonic receiver. There's some slight crosstalk between the Tx and Rx so in order to clean up the Rx signal I'm using a comparator. On my I'm applying 0.8V at the inverting terminal of the comparator and the amplified Rx signal to the non-inverting terminal. On my understanding every time the Rx signal is over 0.8V the comparator should output a signal close to the supplied voltage of 5V and ground when under 0.8 V? I have attached two oscilloscope traces, one from when there is no object in front of the Tx and Rx and one when there is an object placed.
Attachments
-
52.3 KB Views: 22
-
43.3 KB Views: 22