A 70–86-GHz Deep-Noise-Canceling LNA With Dual-Stage Noise Cancellation Using Asymmetric Compensation Transformer and 4-to-1 Hybrid-Phase Combiner

In this article, a 70–86-GHz deep-noise-canceling low noise amplifier (LNA) is presented to reduce the noise contributions from the multi-stage amplifiers under low transistor $g_{m}$ at mm-wave. Such an LNA consists of dual-stage noise-canceling topology, i.e., an asymmetric common-gate (CG)-based noise-canceling stage and a resistive feedback noise-canceling stage. The asymmetric compensation transformer (ACT) is utilized in the CG-based noise-canceling stage to compensate the amplitude and phase imbalances, thereby enhancing the noise-canceling ratio. In addition, the second stage based on resistive feedback noise-canceling operation with a 4-to-1 hybrid-phase combiner (HPC) is introduced to reduce the transistor noise contribution, especially improving noise performance at mm-wave band. Based on the aforementioned mechanism, a deep-noise-canceling LNA is implemented and fabricated using a conventional 40-nm CMOS technology. The proposed LNA exhibits a 4.8–6.5-dB noise figure (NF) within the operation frequency range of 70–86-GHz. The peak gain is 16.5 dB, while the peak input 1-dB compression point (IP $_{1\,\text {dB}}$ ) is −8.5 dBm. The power consumption is 25 mW under a 1.1-V supply, which occupies a compact core area of 0.085 mm2.