JSSC 2024第12期RF & Wireless28nmNeural Network Accelerator

A 167-µW 717-dB SFDR 24-GHz BLE Receiver Using a Passive Quadrature Front End a

一款采用无源正交前端的高效BLE接收器设计

71dB增益,8.5dB噪声系数,20.1dBm OOB-IIP3,71.7dB SFDR

BLE接收器无源前端正交混频低功耗28nm CMOS

▸采用无源正交前端（QFE）实现阻抗匹配和电压增益

▸基于双平衡级联混频器的频率下转换技术

▸混合低中频滤波器增强邻道抑制能力

Abstract

This article reports a 2.4-GHz Bluetooth low-energy (BLE) receiver with a number of passive-intensive RF functions to improve power efficiency and blocker resilience. It features a passive quadrature front end (QFE) built with a hybrid coupler plus two step-up transformers. They passively provide input-impedance matching, voltage gain, and single-ended-to- differential-I/Q RF generation. The four-phase RF outputs simplify the LO generator into a 2.4-GHz class-D voltage- controlled oscillator (VC