← 返回 JSSC 论文列表JSSC 2006第6期Analog Circuits0.18μm
Dynamic Power Optimization of Active Filters With Application to Zero-IF Receive
本文通过动态阻抗缩放和动态偏置技术优化滤波器功耗,适用于零中频GSM接收机。
0.18μm CMOS, 1.2V, 100kHz截止频率
动态功耗优化有源滤波器零中频接收GSMCMOS工艺
▸创新点1:动态阻抗缩放技术(方法创新) - 通过实时调整滤波器阻抗匹配输入信号强度,实现功耗动态优化,在信号强度增加3dB时功耗降低50%,显著提升能效。
▸创新点2:动态偏置技术(电路创新) - 采用可编程偏置电路根据信号电平动态调节运放工作点,在0.18μm CMOS工艺下实现从2.22mA至最低0.46mW(约0.38mA)的功耗调节范围。
▸创新点3:抗瞬态切换算法(系统创新) - 设计专用状态机控制阻抗与偏置的协同切换时序,消除模式转换过程中的瞬态干扰,确保GSM接收机在五级功率设置间切换时无信号失真。
▸创新点4:多级功率调节架构(电路创新) - 创新性采用五级可配置功耗模式,通过数字控制字实现滤波器线性度(IIP3>15dBm)与功耗的精细权衡,适应零中频接收机不同信道条件。
Abstract
This paper describes the use of dynamic impedance
scaling and dynamic biasing to dynamically optimize the power
dissipation of filters depending on the inband signal level. Tran-
sients due to the dynamical changes inside the filter are prevented
thanks to the implementation of appropriate switching algorithms.
To illustrate the concept, a fifth-order Chebychev low-pass ac-
tive-RC filter with 100-kHz cutoff frequency, designed for partial
channel selection in a zero-IF GSM receiver, is presented. T