tony_lth
Advanced Member level 5
HI, Gurus,
I need to detect an impulse:
rising edge=5ns, down edge=200ns, amp=10uV, just once in a day, and I need to catch it, how can I do?
I suppose to config as the following: filter1+LNA+filter+detector+video amp+LPF+ADC/FPGA.
But there are so many specs need to determine:
1. Filter1 center freq, BW. Say filter1 BW=100M, then noise floor is -174+80=-94dBm. SNR=10, so signal energy=-84dBm at least. But 10uV is -87dBm. So how can I determine the center freq and BW?
2. Why is the detector purpose in this link? I guess ADC can directly sample the 100M(Or other BW?) signal.
3. For detect such low signal, how to do the power supply? And how to select the video amp or op-amp?
Many thanks.
Tony Liu
I need to detect an impulse:
rising edge=5ns, down edge=200ns, amp=10uV, just once in a day, and I need to catch it, how can I do?
I suppose to config as the following: filter1+LNA+filter+detector+video amp+LPF+ADC/FPGA.
But there are so many specs need to determine:
1. Filter1 center freq, BW. Say filter1 BW=100M, then noise floor is -174+80=-94dBm. SNR=10, so signal energy=-84dBm at least. But 10uV is -87dBm. So how can I determine the center freq and BW?
2. Why is the detector purpose in this link? I guess ADC can directly sample the 100M(Or other BW?) signal.
3. For detect such low signal, how to do the power supply? And how to select the video amp or op-amp?
Many thanks.
Tony Liu