N Channel Mosfet High Side Switch

To switch v with a p channel mosfet.

N channel mosfet high side switch.

In order to do this the gate voltage must be magnified in some way. N channel mosfets have lower on resistances than p channel mosfets so are preferable if you have the choice of which side to switch. The higher the voltage the more the mosfet can conduct. For an n channel mosfet the source connects to ground and the drain connects to the negative side of the load.

2 n channel mosfet configured as high side switch you can quite easily see the difference between the high side configuration and the low side configuration. Although the p channel mosfet cannot complement the n channel in both on resistance and capacitance simultaneously such combinations as the low threshold p channel tp0610 and the n channel 2n7000. The opposite of the low side switch is the high side switch. While you can use a jfet for this circuit an enhancement mode mosfet works better.

The n channel high side switch. This transistor connects between v and the load. Then the p channel mosfet is used to switch the positive supply to the motor for forward direction high side switching while the n channel mosfet is used to switch the negative supply to the motor for reverse direction low side switching. Used as a high side switch a p channel mosfet in a totem pole arrangement with an n channel mosfet will simulate a high current high power cmos complementary mos arrangement.

In the low side configuration the load is connected between the drain and v while the source is connected to ground. 2 n channel mosfet configured as high side switch you can quite easily see the difference between the high side configuration and the low side configuration. N channel mosfets can also switch v in certain configurations with drain being vin and source being switched vout.