CLC number: TN712

Second-Order Transconductance-Mode Universal Filter Based on CCCII and OTA

基于OTA和CCCⅡ二阶跨导模式通用滤波器

¹ School of Information Engineering, Shaanxi University of International Trade & Commerce, Xi'an 712046, Shaanxi, China
² School of Physics and Electronic Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, China

Received: 24 May 2025

Abstract

This research, based on Mason's formula, proposes a novel design for a second-order transconductance-mode universal filter with the operational transconductance amplifier (OTA) as the core and the second-generation current-controlled conveyor (CCCⅡ) as the auxiliary. The circuit incorporates two OTAs, one CCCⅡ, two grounded capacitors, and one grounded resistor. The quality factor Q and natural frequency f_o of the filter can be electronically tuned and are not sensitive to temperature. The input and output terminals of the circuit exhibit no loading effect, and the sensitivity of the circuit is low. At last, alternating frequency analysis, parameter scanning analysis, and temperature scanning analysis have been carried out by using Multisim software, confirming the correctness and effectiveness of the designed circuit.

摘要

本文基于Mason公式，提出了一种以OTA为核心，CCCⅡ为辅助的二阶跨导模式通用滤波器的设计方案。该电路包括两个OTA、一个CCCⅡ、两个接地电容器和一个接地电阻。该滤波器的品质因数Q和自然频率f_o可以电控调谐，且对温度不敏感。该电路的输入端和输出端均无加载效应，电路的灵敏度较低。最后利用Multisim软件进行了交流频率分析、参数扫描分析和温度扫描分析，验证了所设计电路的正确性和有效性。