Hi all,
this is my first post in this forum and I thank you in advance for any advice you could provide.
I am not an expert in electronics, but I need to design a very simple circuit to switch a 3.3V signal on a 50 ohm load that absorbs approx. 60 mA.
The switching should be able to operate at 1 MHz with a 5V square wave on the gate.
I prepared two very simple schematics. One uses a p-channel MOSFET and the other one an n-channel MOSFET (figure attached). I used the devices BSS138 and LP0701, which should in theory provide the right performance.
Looking in the internet, I see that p-channel MOSFETs are used in most cases when the load is connected to ground.
However, I simulated the two schematics in LTSpice and they provide similar performance (dispite the fact that the output signals are complementary since the two mosfets are open or close with 5V on the gate.
Could you please tell me why the p-channel solution should be preferred?
Thanks a lot
this is my first post in this forum and I thank you in advance for any advice you could provide.
I am not an expert in electronics, but I need to design a very simple circuit to switch a 3.3V signal on a 50 ohm load that absorbs approx. 60 mA.
The switching should be able to operate at 1 MHz with a 5V square wave on the gate.
I prepared two very simple schematics. One uses a p-channel MOSFET and the other one an n-channel MOSFET (figure attached). I used the devices BSS138 and LP0701, which should in theory provide the right performance.
Looking in the internet, I see that p-channel MOSFETs are used in most cases when the load is connected to ground.
However, I simulated the two schematics in LTSpice and they provide similar performance (dispite the fact that the output signals are complementary since the two mosfets are open or close with 5V on the gate.
Could you please tell me why the p-channel solution should be preferred?
Thanks a lot
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