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A Four-Channel BiCMOS Transmitter for a Quantum Magnetometer Based on Nitrogen-V
基于氮空位中心的量子磁力计四通道BiCMOS发射器设计
412mA pp输出电流，6.4-8GHz频率范围，170µT磁场强度
量子传感器氮空位中心微波电子磁力计BiCMOS
▸创新点1：7GHz宽带低噪声微波信号生成 - 采用创新的正交锁相环（QPLL）芯片设计，实现22%的宽调谐范围和-122dBc/Hz@1MHz的低相位噪声，为宽带低噪声磁力测量提供高稳定性的本地振荡信号。
▸创新点2：4通道高电流发射器设计 - 通过BiCMOS工艺实现4通道高电流发射器，支持6.4-8GHz宽频带工作，每通道输出电流高达412mA pp，驱动定制电感产生强微波磁场。
▸创新点3：玻璃基板透明线圈制造 - 创新性地采用玻璃基板制造光学透明线圈，兼具大活性区域（π×180×180µm²）和光学透明特性，支持170µT强磁场生成与光学检测磁共振实验。
▸创新点4：系统级集成与性能突破 - 通过芯片化集成实现32nT/√Hz（直流）和300pT/√Hz（交流）的磁场检测限，显著提升量子磁力计的小型化、低成本与可扩展性。
Abstract
Quantum sensors based on solid-state defects, such
as the nitrogen-vacancy (NV) center in diamond, offer very good
room-temperature sensitivity, long-term stability, and the poten-
tial for calibration-free measurements. However, most quantum
sensors still suffer from a bulky size and weight, low energy
efficiency, and high costs, prohibiting their widespread use. Here,
we present custom-designed chip-integrated microwave (MW)
electronics for a miniaturized, low-cost, and highly scalable
quantum