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.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
片内直流电压信号
放大器
线性
频率调制
解调
on-Chip DC signal amplifier
linearity
frequency modulation
demodulation