Performance improvement of multi-stacked CMOS mm-wave power amplifiers based on negative capacitance phase compensation
Montaseri, Mohammad Hassan; Rahkonen, Timo; Aikio, Janne; Pärssinen, Aarno (2018-07-05)
M. H. Montaseri, T. Rahkonen, J. Aikio and A. Pärssinen, "Performance Improvement of Multi-Stacked CMOS mm-Wave Power Amplifiers Based on Negative Capacitance Phase Compensation," 2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC), Brive La Gaillarde, 2018, pp. 1-3. doi: 10.1109/INMMIC.2018.8429990
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https://urn.fi/URN:NBN:fi-fe201902134747
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Abstract
This paper proposes a method for performance improvement of multi-stacked CMOS millimeter-wave power amplifiers based on negative capacitance phase detuning, which can be generalized to other phase detuning techniques. It not only yields better inter-stage matching between stacks, but also offers the advantage of relaxed inter-stage phase rotation due to transistor parasitics. A x1.6 output power/gain and 7% efficiency improvement is observed as a result of the proposed technique. This is achieved because phase misalignment between stacks is minimized. The method is evaluated using simulations based on 28GHz PA in 45nm CMOS technology.
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