自跟踪对数域滤波器的设计
发布时间：2018-07-14 13:12
【摘要】：在LC梯形网络设计的基础上,提出一种流控自跟踪二阶滤波器的电路结构和实现方法.输入的电压信号先经放大电路处理后,再经限幅电路、整形电路及宽频频率电流转换电路组成的频率自跟踪电路,将放大的电压信号转换为电流信号,以该电流信号作为对数域滤波电路的偏置电流控制端间接调节滤波器的截止或中心频率,从而实现滤波频率对输入频率的自动跟踪.仿真实验结果表明,带通滤波器和低通滤波器的最高中心频率为30MHz,对输入频率的跟踪范围为1~30 MHz.仿真实验验证了该设计方法的有效性和可行性.
[Abstract]:Based on the design of LC trapezoidal network, this paper presents a circuit structure and implementation method of a flow control self-tracking second-order filter. The input voltage signal is first processed by the amplifier circuit, then by the frequency self-tracking circuit composed of the limiting circuit, the shaping circuit and the wide-band frequency-current conversion circuit, the amplified voltage signal is converted into the current signal. The current signal is used as the offset current control terminal of the logarithmic domain filter circuit to indirectly adjust the cut-off or center frequency of the filter so as to realize the automatic tracking of the input frequency by the filter frequency. The simulation results show that the highest center frequency of the band-pass filter and the low-pass filter are 30MHz and the tracking range of the input frequency is 1mHz. Simulation results show the effectiveness and feasibility of the design method.
【作者单位】： 西北师范大学物理与电子工程学院甘肃省原子分子物理与功能材料重点实验室;
【基金】：国家自然科学基金(批准号:61162017) 西北师范大学青年教师科研能力提升计划项目(批准号:NWNU-LKQN-13-16)
【分类号】：TN713
[Abstract]:Based on the design of LC trapezoidal network, this paper presents a circuit structure and implementation method of a flow control self-tracking second-order filter. The input voltage signal is first processed by the amplifier circuit, then by the frequency self-tracking circuit composed of the limiting circuit, the shaping circuit and the wide-band frequency-current conversion circuit, the amplified voltage signal is converted into the current signal. The current signal is used as the offset current control terminal of the logarithmic domain filter circuit to indirectly adjust the cut-off or center frequency of the filter so as to realize the automatic tracking of the input frequency by the filter frequency. The simulation results show that the highest center frequency of the band-pass filter and the low-pass filter are 30MHz and the tracking range of the input frequency is 1mHz. Simulation results show the effectiveness and feasibility of the design method.
【作者单位】： 西北师范大学物理与电子工程学院甘肃省原子分子物理与功能材料重点实验室;
【基金】：国家自然科学基金(批准号:61162017) 西北师范大学青年教师科研能力提升计划项目(批准号:NWNU-LKQN-13-16)
【分类号】：TN713
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1 龚李亮,何怡刚,彭玉楼;基于对数域电路的连续小波变换模拟实现的可行性分析[J];微电子学与计算机;2003年08期
2 凌燮亭,秦巍,胡波;对数域积分电路的分析与应用[J];电子学报;2000年02期
3 蔡理,马西奎;低电压对数域滤波器的低功率性能分析[J];空军工程大学学报(自然科学版);2001年04期
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