Large bandwidth tunable analog equalizers based on an InP DHBT differential pair amplifier cell for 100-GBaud communication systems
01 January 2014
We report the design, simulations and measurements of two tunable analog equalizers. These circuits have been realized using indium phosphide heterojunction bipolar transistors reaching fT/fmax of 370/340 GHz. These analog equalizers provide a bandwidth of more than 100 GHz, depending on the settings. A varactor is used to tune the frequency response to equalize various types of 100-GBaud communication system channels.