← 返回 JSSC 论文列表JSSC 2006第9期Analog Circuits0.18μm CMOS
2 GHz 81-Enhanced Active Filter With Low Passband Distortion and High Dynamic Ra
提出一种低通带失真、高动态范围的2 GHz 81增强型可调谐滤波器，采用交叉耦合差分对和LC谐振器技术。
2.0 GHz中心频率，130 MHz带宽，3%频率可调，6.6 dBm 1-dB压缩点，15 dB噪声系数，17 mW功耗
可调谐滤波器Q值增强低通带失真LC谐振器动态范围
▸使用交叉耦合差分对增强螺旋电感器的Q值
▸通过第二LC谐振器退化实现频率依赖性补偿
▸可直流电压控制的Q值增强技术
Abstract
A tunable /81-enhanced filter with low passband dis-
tortion is presented. The /81of the on-chip spiral inductors that
form the filter resonators is enhanced by using a cross-coupled dif-
ferential pair which is degenerated by a secondLC tank. This tech-
nique allows for frequency dependent compensation of inductor
losses and ensures that the
/81-enhanced LC resonators have a fre-
quency behaviour close to the ideal in the passband of the filter.
The circuit allows DC voltage control of
/81-enhance