A miniaturized 70-GHz broadband amplifier in 0.13-μm CMOS technology

Abstract

A 70-GHz broadband amplifier is realized in a 0.13- μm CMOS technology. By using five cascaded common- source stages with the proposed asymmetric transformer peaking technique, the measured bandwidth and gain can reach 70.6 GHz and 10.3 dB under a power consumption (P DC) of 79.5 mW. Within the circuit bandwidth, the maximum input and output reflection coefficients are -6.1 and -10.8 dB}, respectively. The group delay variation is ± 12.0 ps, and the output 1-dB compression point is 0.2 dBm at 5 GHz. With the miniaturized transformer design, the occupied core area of the circuit is only ∼ 0.05 mm2. This amplifier demonstrates a gain-bandwidth product of 231 GHz and a GBW/PDC up to 2.9 GHz/mW. © 2006 IEEE.