I am working on a passive cell balancing circuit using N-Mosfet ,The cell voltage will be monitored by the micro-controller and it can also generate corresponding logic level signal according to over charge for a particular cell ,i want to build a control circuit that can individually switch the N-Mosfet connected in series so that the a particular cell which is overcharged is discharged via resistor and the overcharge cell is balanced.How can i build a drive circuit for the N-mosfet?