100GHz+ Gain-Bandwidth Differential Amplifiers in a Wafer Scale Heterogeneously Integrated Technology using 250nm InP DHBTs and 130nm CMOS

Differential amplifiers incorporating the advantages of both Si and III-V technologies have been fabricated in a wafer scale, heterogeneously integrated, process using both 250 nm InP DHBTs and 130 nm CMOS. These ICs demonstrated gain- bandwidth product of 40-130 GHz and low frequency gain >45 dB. The use of InP DHBTs supports a 6.9 V differential output swing and a slew rate >4times10⁴ V/mus to be achieved with as low as 40 mW dissipated power. A novel on-chip buffer circuit is used to facilitate the on-wafer characterization of these amplifiers. To the authors´ knowledge, this is the first demonstration of a high performance IC building block in a heterogeneously integrated process technology.