This paper presents a 26-GHz-band high back-off efficiency power amplifier (PA) IC with adaptively controlled bias and load circuits in 45-nm CMOS SOI. A 4-stacked-FET is employed to increase the output power and to conquer the low breakdown voltage issue of scaled MOSFET. The adaptive bias circuit is reviewed and the adaptive load circuit which consists of an inverter circuit and transformer-based inductors is described in detail. The measured performance of the PA IC is fully shown in this paper. The PA IC exhibits a saturated output power of 20.5 dBm and a peak power-added-efficiency (PAE) as high as 39.4% at a supply voltage of 4.0 V. Moreover, the PA IC has exhibited an excellent ITRS FoM of 82.0 dB.
|ジャーナル||IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences|
|出版ステータス||Published - 2021 2 1|
ASJC Scopus subject areas
- Signal Processing
- Computer Graphics and Computer-Aided Design
- Electrical and Electronic Engineering
- Applied Mathematics