两种新型甚高频可调谐CMOS低压线性变换器及其在高频GM-C滤波器设计中的应用

F. Muñoz, A. Torralba, R. Carvajal, J. Ramírez-Angulo
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引用次数: 17

摘要

介绍了两种用于高频(HF)应用的新型CMOS低压线性变换器。他们在每个逆变器的输入和晶体管门之间使用可调浮动电压源,形成了Nauta(1992)提出的晶体管。提出了浮动电池的两种实现方法。所提出的晶体管工作在低至1.2 V的恒定低压电源下,跨导和输出电阻是独立可调的。适用于中心频率和品质因数可编程的高频连续时间滤波器。为此,给出了一个10.7 MHz带通g/sub m/ c滤波器在1.5 V电压和大输入摆幅下工作的仿真结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Two new VHF tunable CMOS low-voltage linear transconductors and their application to HF GM-C filter design
Two new CMOS low-voltage linear transconductors for High Frequency (HF) applications are presented. They use tunable floating voltage sources between the input and the transistor gates of each inverter that forms the transconductor proposed by Nauta (1992). Two implementations of the floating batteries are presented. The proposed transconductors operate under constant low voltage supply as low as 1.2 V and transconductance and output resistance are independently tunable. It is suitable to be used in HF continuous time filters with programmable center frequency and quality factor. To this end, simulation results of a 10.7 MHz band-pass g/sub m/-C filter operating at a voltage supply of 1.5 V and large input swing are presented.
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