A high-efficient CMOS RF power amplifier with automatic adaptive bias control
Journal
IEEE Microwave and Wireless Components Letters
Journal Volume
16
Journal Issue
11
Pages
615-617
Date Issued
2006
Author(s)
Abstract
A 2.4-GHz Doherty power amplifier (PA) is developed in 0.18-μm CMOS technology. An automatic adaptive bias control circuit is integrated with the auxiliary PA to improve the overall performance of the PA. Operated at 3 V, the P 1 dB and associated power-added-efficiency (PAE) of the PA are 21 dBm and 33%, respectively. At the output power 6-dB backoff from P 1 dB, the PAE remains 21 %. The limited PAE degradation at backoff power levels makes the PA suitable for the applications with high peak-to-average power ratio. © 2006 IEEE.
Subjects
Adaptive bias; CMOS; Doherty power amplifler (PA); Orthorgonal frequency division multiplexing (OFDM); Peak-to-average power ratio (PAPR)
Other Subjects
Adaptive bias; Doherty power amplifiers (PA); Peak-to-average power ratio (PAPR); Adaptive control systems; CMOS integrated circuits; Orthogonal frequency division multiplexing; Power amplifiers
Type
journal article