JSSC 2024第4期RF & Wireless65nmPower AmplifierNeural Network Accelerator

A Time-Mode-Modulation Digital Quadrature Power Amplifier Based on 1-bit DeltaSi

提出一种基于1位ΔΣ调制和时间模式调制的数字正交功率放大器，实现高功率回退效率。

65nm CMOS, 2.6GHz, 26.4% PAE@64-QAM 40MSymbol/s, 20.9% PAE@256-QAM 20MSymbol/s

时间模式调制数字功率放大器ΔΣ调制混合FIR滤波器正交幅度调制

▸采用1位ΔΣ调制器和数字混频器将多比特基带I/Q信号编码为1位信号控制PA开关

▸无需电容阵列，避免传统开关电容PA的充电功耗

▸混合FIR滤波器抑制ΔΣ调制量化噪声，保持高线性度

Abstract

This article proposes a time-mode-modulation (TMM) digital quadrature power amplifier (PA), which can realize high power efficiency at power back-off (PBO) by applying the 1-bit delta–sigma modulator (DSM) and hybrid finite impulse response (FIR) filter. The 1-bit DSM and digital mixer encode the multi-bit baseband I/ Q input signal into a 1-bit signal for on/off controlling the 1-bit PA to realize the TMM operation. Capacitor arrays are not required in the proposed PA, and redundant power dissi