Hi,
I am trying to learn to make a voltage follower using a mosfet. It is supposed to be following the voltage signal given by an op amp that gets its signal from PC sound.
Oscilloscope shows 2V voltage swing (is this -1 to 1V swing?) from PC and 0-5V swing over the 1M resistor before the mosfet.
The mosfets I tried to use for this are 50N06 and IRF740. The problem I have is that the mosfet is not opening. My oscilloscope doesnt show any voltage over the load. I have tried using a 4W DC motor and various resistors as a load.
Could someone tell me what in the plan is wrong?
images taken from
http://blog.oscarliang.net/wp-content/uploads/2013/10/electronics_mosfet_schematic.png
http://www.rason.org/Projects/opamps/design1.gif
I am trying to learn to make a voltage follower using a mosfet. It is supposed to be following the voltage signal given by an op amp that gets its signal from PC sound.
Oscilloscope shows 2V voltage swing (is this -1 to 1V swing?) from PC and 0-5V swing over the 1M resistor before the mosfet.
The mosfets I tried to use for this are 50N06 and IRF740. The problem I have is that the mosfet is not opening. My oscilloscope doesnt show any voltage over the load. I have tried using a 4W DC motor and various resistors as a load.
Could someone tell me what in the plan is wrong?
images taken from
http://blog.oscarliang.net/wp-content/uploads/2013/10/electronics_mosfet_schematic.png
http://www.rason.org/Projects/opamps/design1.gif