+24 v | | | | fet_1 fet_3 | | (a)|-----motor-----| | | | | fet_4 fet_2 | | | | Hi there, Suppose that the bridge depicted is used to only to reverse the motor, not using PWM. Is it true that, when fet_1 & fet_2 are on, point (a) is not at ~zero volts, and therefore you need a gate bias higher than 24v to turn fet_1 on ? I read this is the case but i really don't get it why it's so. Anybody care to explain it to me ? Does Using PWM make any diference regarding bias for the fets ? Thanks a lot! -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.