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Digitally-Controlled Polar Transmitter Using a Watt-Class Current-Mode Class-D C
本文展示了一种数字控制的极性发射器，采用瓦级电流模式D类放大器，在0.15微米RF CMOS工艺中实现高效率和高输出功率。
31dBm输出功率，51%漏极效率，0.75GHz频率，26.5%整体效率
数字控制极性发射器电流模式D类瓦级功率CMOS
▸使用堆叠FET的电流模式D类配置以提高击穿电压和效率
▸采用环形Guanella反向巴伦实现1:4阻抗变换且插入损耗低于1dB
▸数字脉宽调制与3GHz时钟同步的降压转换器供电
Abstract
A digitally-controlled pola rt r a n s m i t t e rw i t ha
watt-class CMOS power ampli fier is demonstrated, implemented
in a 0.15 m RF CMOS process. Stacked FETs in a current-mode
class-D con figuration are used to obt ain high breakdown voltage
a n dh i g he fficiency in the output stage, and a doughnut-shaped
Guanella reverse balun is applie d to achieve a 1-to-4 impedance
transformation with less than 1 dB insertion loss. The ampli fier
has 31 dBm output power with 51% drain ef ficiency at 0.75 G