Hello everyone, thank you for the responses so far. I was a little bit confused because today I saw some schematics with and without a resistor in serial to the gate and I was wondering about this purpose. The resistor from the RAx or RBx to GND are used suppress voltage spikes caused by HF noise since the gate has a quite high impedance. The circuit will consist of 12 MOSFET drivers all independently driven in PWM mode such that a good noise reduction is essential. Unfortunatelly, I do not have an oscilloscope such that I simply have to "guess" some "good" value and to hope that everything works well enough. So, what are your suggestions? Is this resistor value critical. Do you have some "empirical values"? 10 Ohms, 50 Ohms, 100 Ohms? Best Markus -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist