Patent ID: 8779819
Filing Date: 2014-07-15
Classification: H03K

Abstract:
1. A method of adjusting the rise time and fall time of output signals generated by a voltage-mode differential transmitter (VMT), the method comprising: a) receiving at least one of a first output signal generated by a first driver of the VMT and a second output signal generated by a second driver of the VMT to obtain at least one received signal, the first driver including first inverter elements electrically connected to each other in parallel, the second driver including second inverter elements electrically connected to each other in parallel, each first inverter element and each second inverter element having a PMOS device and an NMOS device, the first output signal and the second output signal having a rise time and a fall time; b) processing the at least one received signal to determine if there is difference between the fall time and the rise time; and c) responsive to determining that there is a difference between the fall time and the rise time, modifying, in each of the first driver and the second driver, a ratio of a number of enabled PMOS devices to a number of enabled NMOS devices to reduce the difference between the fall time and the rise time.