I'd like make a voltage buffer with MOSFET
STD12NF06L-1 IPAK - STMicroelectronics
Drain is given below:
Source. I will do it later.)
Yellow circle indicates
SMA port, a pair of signal and GND. Red and black are Vcc and GND, respectively.
What I concern is,
power supply may have different GND level.
And USRP consists of FPGA and
daughterboards with ADC, DAC and signal processor.
I am worried that either USRP or power supply gets damaged if I connect both GNDs to meet each other.
Therefore, my question is, should they have shared GND? If yes, how do two different equipments share the GND?