Using a PWM Signal generator to drive MOSFET transistor?
If you want to stay safe, you should use a separate and isolated power supply for the signal generator. Use something like a wall wart.
The output of the signal generator can drive a typical low side switch device, albeit poorly. This includes N channel MOSFETs, power NPN BJTs, and IGBTs.
The signal generator probably can't source enough current to switch your switch on and off fast enough, and may not even be enough to turn it on fully (for the case of BJTs). Consider using a dedicated switch driver.