Other Parts Discussed in Thread: TINA-TI
Tool/software:
Dear Engineers,
I designed a transimpedance amplifier by OPA837 as follows:
The negative input of OPA837 is connected to a ultrasound transducer, which is a current source with the following characteristics:
C=1nF, R=1.2K, current= 200uA @ 3MhZ
Based on my simulation in TINA-TI we can see we should get : 43.5 dB amplification:
SNR:
But what I got in my real setup is as follows, which is very smaller than 43.5 dB:
The orange signal is the input signal to the amplifier and the blue signal is the output form the OPA837.
My circuit in Altium:
Would you please let me know what should I change in my circuit to achieve the same Amplification and SNR, that I got in my simulation?
Regards,
