用于低场NMR的低噪声前置放大器研制

李科言, 程鑫, 陈俊飞, 曹丽, 黄臻, 刘朝阳

Development of Low-noise Preamplifier for Low-field NMR

LI Keyan, CHENG Xin, CHEN Junfei, CAO Li, HUANG Zhen, LIU Chaoyang

图4 共射放大电路-电压负反馈小信号等效电路

Fig. 4 Small-signal equivalent circuit of common-emitter amplifier with voltage-negative feedback