Single-CFA first-order allpass filter

IEICE Electronics Express

Koushick Mathur²  Sandhya Pattanayak³  Rabindranath Nandi¹ 

[1] Department of Electronics & Telecommunication Engineering, Jadavpur University;Department of Electronics & Communication Engineering, UIT-Burdwan University;Department of Electronics & Communication Engineering, Narula Institute of Technology

关键词: allpass filter;    Phase equalizer;    CFA;    DVCCTA;   

DOI  :  10.1587/elex.13.20151039

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(25)A simple first order allpass filter (APF) realization scheme with single current feedback amplifier (CFA) is presented; the phase-select component Y (= sC) is grounded. Analysis indicates that effects of imperfect port mismatch ratio of the CFA are quite insignificant. However the device parasitic capacitors introduce certain phase error at relatively higher frequencies. This simple circuit may be extended to second order APF design, if desired with Y as a shunt −LC resonator; L being a lossless inductor simulated by a DVCCTA element. Literature study on recent first order APF indicates that these are based on active elements that are based essentially on assorted conjoined versions of two types of devices.

【 授权许可】

Unknown