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A.M. Soliman, “Applications of current feedback amplifier,” Anal. Intregr. Circuits Signal Process. vol. 11, pp. 265-302, 1996.

has been cited by the following article:

Article

New Very Low Frequency Oscillator Using only a Single CFOA

1Electronics Engineering Department, Institute of Engineering and Technology, Lucknow, 226021 India

2Division of Electronics and Communication Engineering, NetajiSubhas Institute of Technology, Sector 3, Dwarka, New Delhi, 110078, India


American Journal of Electrical and Electronic Engineering. 2015, Vol. 3 No. 1, 1-3
DOI: 10.12691/ajeee-3-1-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
D. K. Srivastava, V. K. Singh, R. Senani. New Very Low Frequency Oscillator Using only a Single CFOA. American Journal of Electrical and Electronic Engineering. 2015; 3(1):1-3. doi: 10.12691/ajeee-3-1-1.

Correspondence to: V.  K. Singh, Electronics Engineering Department, Institute of Engineering and Technology, Lucknow, 226021 India. Email: vksingh@ietlucknow.edu

Abstract

Some time back, Elwakil presented a systematic method of realizing Very Low frequency (VLF) oscillators using current feedback operational amplifiers (CFOA) and demonstrated that the classical Wienbridge oscillator, employing the concept of composite resistor (containing two positive and one negative resistance) can be tailored to generate VLF oscillations. The circuit proposed by Elwakil, however, required two CFOAs along with six resistors and two capacitors. The object of this paper is to report a new VLF oscillator circuit which, in contrast to Elwakil’s circuit, requires onlya single CFOA. The workability of the new circuit has been demonstrated by experimental results using commercially available AD844type CFOAs.

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