A 25-GHz 9-dB distributed amplifier in CMOS technology

A common source single-ended distributed amplifier using 0.18-µm CMOS technology is presented in this paper. The four-stage DA demonstrates a relatively flat gain of 9.0 dB from 3.1GHz to 12.5GHz with less than 1.0dB ripple and a unity-gain bandwidth of 25.5GHz while the minimum value of noise figure is 3.6dB at 6.9GHz. Staggering technique is used to prevent instability. The proposed amplifier dissipates 158mW with a 1.8 V power supply.