Title :
Comments on "A new continuously tunable sinusoidal oscillator without external capacitors"
Author :
Venkateswaran, Subramanian ; Venkataramani, Y. ; Bhattacharyya, B.B. ; Natarajan, Sriraam
Abstract :
Bhattacharyya and Natarajan have established the condition for oscillation of a three operational amplifier (OA) active-R oscillator. This letter shows that the integrator model used by them is incorrect. Analysis, based on single pole model, indicates the absence of oscillations. However, conditions for oscillations exist when a two pole model of the OA´s is taken.
Keywords :
Bandwidth; Capacitors; Costs; Frequency; Operational amplifiers; Oscillators; Packaging; Resistors; Tunable circuits and devices;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1979.11488
