DC-40 GHz amplifier for high-speed optical communications designed with the real frequency technique

Synchronous optical network (SONET/SDH) requirements for 40 Gbps links impose transmitter drivers to provide a high and linear voltage swing to the modulator from a few kilohertz to 40 GHz. This paper presents a two stage DC-40 GHz GaAs P-HEMT amplifier including a level shift part for DC-coupling. The design synthesis method uses the real frequency technique.