mcoster
Member level 2
Hi,
i am simulating this circuit using M*I*C*R*O*C*A*P VII and i am not getting any results.
In my opinion it seems to work, but that's not what i am getting.
I have to build a simple power amplifier to output AC current to a capacitive load, so i decided to use mosfet as output amplifiers (operating in class B).
I believe that the OPAMP cancels the cross-over effect of the Vth (threshold voltage of the MOSFET).
The main problem is that the OPAMP (according to simulations) has a DC voltage at its output plus the AC voltage that i want to amplify and i think this effect is saturating the output waveform (similar effect to a saturated transistor when it is working as a amplifier)
Please help me to find where i go wrong. I also would appreciate any sugestions on possible circuits and books where i could lear about MOSFET.
I got this example circuit from:
https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/first11/part9/page1.html
Thanks very much.
mcoster
i am simulating this circuit using M*I*C*R*O*C*A*P VII and i am not getting any results.
In my opinion it seems to work, but that's not what i am getting.
I have to build a simple power amplifier to output AC current to a capacitive load, so i decided to use mosfet as output amplifiers (operating in class B).
I believe that the OPAMP cancels the cross-over effect of the Vth (threshold voltage of the MOSFET).
The main problem is that the OPAMP (according to simulations) has a DC voltage at its output plus the AC voltage that i want to amplify and i think this effect is saturating the output waveform (similar effect to a saturated transistor when it is working as a amplifier)
Please help me to find where i go wrong. I also would appreciate any sugestions on possible circuits and books where i could lear about MOSFET.
I got this example circuit from:
https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/first11/part9/page1.html
Thanks very much.
mcoster