A Single Resistor Tunable Grounded Capacitor Dual-Input Differentiator

• 作者: Koushick Mathur Palaniandavar Venkateswaran Rabindranath Nandi
• 来源期刊: 电路与系统(英文)
• 学科: 医学
• 关键词: CFA TUNABLE DIFFERENTIATOR Dual-Input DIFFERENTIATOR Wave SHAPER
• 年，卷（期）: dlyxtyw_2015,（3）
• 页码范围: 49-54
• 页数: 6页
• 分类号: R73

摘要

A new current feedback amplifier (CFA) based dual-input differentiator (DID) design with grounded capacitor is presented;its time constant (τo) is independently tunable by a single resistor. The proposed circuit yields a true DID function with ideal CFA devices. Analysis with nonideal devices having parasitic capacitance (Cp) shows extremely low but finite phase error (θe);suitable design θe could be minimized significantly. The design is practically active-insensitive relative to port mismatch errors (ε) of the active element. An allpass phase shifter circuit implementation is derived with slight modification of the differentiator. Satisfactory experimental results had been verified on typical wave processing and phase-selective filter design applications.