High-speed output driver

摘要

A high-speed output driver produces a fast differential output signal for a serial transmitter. The output driver includes a first stage circuit which comprises a first active element to pull the first stage circuit output to a logic high and a second active element to pull the first stage circuit output to a logic low. The first active element and the second active element are controlled by complementary signals. The first stage circuit drives a second stage circuit (e.g., a current mode logic circuit) which reacts relatively quickly to signal transitions by steering substantially constant current between differential pair transistors.