JSSC 2019第4期RF & Wireless28nmPLL

A 55-GHz Background-Calibrated SubsamplingPolar Transmitter With 413-dB EVM at 1

一种55GHz背景校准的亚采样极化发射器，具有413dB EVM性能

5.5 GHz, 2.5 MHz BW (1024 QAM), 1.1-dBm输出功率, 50 mW总功耗

亚采样极化发射器背景校准数字功率放大器相位调制CMOS

▸低噪声相位调制数字亚采样锁相环

▸谐波抑制混合逆类D数字功率放大器

▸背景数字AM-AM和PM-PM失真检测与消除

Abstract

We present a subsampling polar transmit- ter (SSPTX) in 28-nm CMOS that consists of a low-noise phase modulating (PM) digital subsampling phase-locked loop (PLL) and a harmonic rejection mixed (HRM) inverse-class-D (D −1) digital power ampliﬁer (DPA) for amplitude modulation (AM). The DPA is, unlike in a typical polar transmitter (TX), placed within the PLL and the phase-error detection happens directly at the DPA output. The subsampling polar TX thus becomes sensitive not only to phase errors b