An electronically tunable realization of voltage differencing transconductance amplifier (VDTA)-based multi-function inverse filter circuit is proposed in this letter. Various responses namely inverse low pass, inverse high pass, inverse band pass, and inverse band reject are achieved through switch settings. The proposed circuit uses only grounded capacitors and adds electronic tunability to filter parameters through bias currents of VDTA. SPICE simulations using TSMC 180 nm CMOS technology parameter are carried out to examine operation, total harmonic distortion and noise performance of proposal. Monte Carlo simulations are performed to study performance of the proposal under simultaneous variation in passive component values, oxide thickness and transistor threshold voltage.

中文翻译：

---

基于电子可调 VDTA 的多功能逆滤波器

在这封信中提出了一种基于电压差分跨导放大器 (VDTA) 的多功能逆滤波器电路的电子可调实现。通过开关设置实现各种响应，即反低通、反高通、反带通和反带阻。建议的电路仅使用接地电容器，并增加了电子可调性，以通过 VDTA 的偏置电流过滤参数。使用 TSMC 180 nm CMOS 技术参数进行 SPICE 仿真，以检查建议的操作、总谐波失真和噪声性能。执行蒙特卡罗模拟以研究在无源元件值、氧化物厚度和晶体管阈值电压同时变化的情况下该提议的性能。