Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

How do I choose the termination resistance for a driver with unbalanced PMOS and NMOS?

April 26, 2017driver NMOS PMOS resistance termination unbalanced

0

Posted

How do I choose the termination resistance for a driver with unbalanced PMOS and NMOS?

1 Answer

0

Posted

The driver’s output impedance R_out for the NMOS and PMOS are 10-ohm and 20-ohm, use 15-ohm for their averaged output impedance, and then match the 15-ohm with the trace impedance by adding a series termination resistor at the output of the driver: R_out + R_termination = Z_trace. If the trace impedance is 50-ohm, use 35-ohm for the series termination resistor.