基于线性频率调制与解调的片上直流电压信号放大器  

An on-chip DC Signal Amplifier based on linear frequency modulation and demodulation

作　　者：马卓[1] 潘国腾[1] 郭阳[1] 谢伦国[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《国防科技大学学报》2012年第3期136-141,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61076025;61070036)

摘　　要：片内直流电压信号摆幅较小,且受到CMOS工艺中被动器件一致性较差、易被高频交流信号干扰等因素的影响,采用典型的比例放大电路难以放大这类信号。为此提出了一种基于"载频"的"→→电压频率电压"放大方法,使用载波信号作为片上长距离传输的信号,将易受到干扰的直流信号局部化,利用前馈补偿技术构建了具有高度线性转换关系的"电压→频率"调制电路,采用具有较高线性度的频率解调电路实现后级电压信号的解调,有效地放大片内直流电压信号。电路仿真结果表明,所提出的放大器电路能有效地放大片上电压信号,直流电压增益为2.4。To amplify the DC signal is a discommodious issue, because of the on-chip DC signal has such properties as little swing, less coherence and likeliness to be interfered. In light of this, a ＂voltage-frequency-voltage＂ mode DC signal amplifier is proposed, in which the frequency is the carrier signal. This amplifier is highly linear, and is equipped with a high linearity ＂ voltage-frequency＂ modulator and a ＂frequency-voltage＂ de-modulator. The simulation experimental results show that the DC signal amplifier amplifies the input voltage signal efficiently while achieving stable high linearity, and the DC gain is 2.4.

关 键 词：片内直流电压信号 放大器 线性 频率调制 解调 

分 类 号：TN432[电子电信—微电子学与固体电子学]