Differential driver circuit having bias equalizing pre-drivers

摘要

A differential driver circuit includes a differential driver configured to drive an output signal based upon a positive leg pull up signal, a positive leg pull down signal, a negative leg pull up signal, and a negative leg pull down signal. A first pre-driver includes a first driver configured to receive a positive leg signal and a first voltage divider coupled to an output of the first driver and configured to produce the first pull up signal and the first pull down signal. A second pre-driver includes a second driver configured to receive a negative leg signal and a second voltage divider coupled to an output of the second driver and configured to produce the second pull up signal and the second pull down signal. The differential driver may include a positive leg and a negative leg, each having a pull up transistor and a pull down transistor.

主权项

1. A differential driver circuit comprising:
a positive leg having a positive leg pull up transistor and a positive leg pull down transistor connected in series between a voltage source and ground; a negative leg having a negative leg pull up transistor and a negative leg pull down transistor connected in series between the voltage source and ground; a first pre-driver having:
a first driver configured to receive a positive leg signal; anda first voltage divider coupled to an output of the first driver and configured to produce a first pull up signal coupled to a gate of the positive leg pull up transistor and a first pull down signal coupled to a gate of the negative leg pull down transistor; and a second pre-driver having:
a second driver configured to receive a negative leg signal; anda second voltage divider coupled to an output of the second driver and configured to produce a second pull up signal coupled to a gate of the negative leg pull up transistor and a second pull down signal coupled to a gate of the positive leg pull down transistor.