Abstract
Recently, voltage differencing-differential input buffered amplifiers (VD-DIBA)-based electronically controllable sinusoidal oscillator has been presented that it does not have the capability of complete independence of frequency of oscillation (FO) and condition of oscillation (CO) as well as electronic control of both CO and FO. In this article, a new fully-uncoupled electronically controllable sinusoidal oscillator using two VD-DIBAs, two grounded capacitors and two resistors has been proposed which offers important advantages such as 1) totally uncoupled and electronically controlled condition of oscillation (CO) and frequency of oscillation (FO); 2) low active and passive sensitivities; and 3) a very good frequency stability factor. The effects of non-idealities of the VD-DIBAs on the proposed oscillator are also investigated. The validity of the proposed formulation has been confirmed by SPICE simulation with TSMC 0.18 μm process parameters.
Highlights
Sinusoidal oscillators find various applications in signal processing, instrumentation, measurement, communication and control systems
Voltage differencing-differential input buffered amplifiers (VD-DIBA)-based electronically controllable sinusoidal oscillator has been presented that it does not have the capability of complete independence of frequency of oscillation (FO) and condition of oscillation (CO) as well as electronic control of both CO and FO
The paper presented by the authors in [14] employs two VD-DIBAs, two grounded capacitors and one grounded resistor but this circuit does not have the capability of complete independence of CO and FO as well as electronic control
Summary
Sinusoidal oscillators find various applications in signal processing, instrumentation, measurement, communication and control systems. The class of single resistance controlled oscillators (SRCOs) using different active element(s)/device(s) has been of particular interest during the last four decades because of their applications in variable frequency oscillators. In fully uncoupled oscillator circuits CO and FO are determined by two completely different sets of active and/ or passive components, that is none of the active and/or passive components appeared in CO are involved in FO and vice versa This feature is very useful for realizing voltage controlled oscillators as FO can be controlled. Paper is, to propose a new fully uncoupled electronically controllable sinusoidal oscillator employing two VDDIBAs, two grounded capacitors and two resistors, which offers 1) fully uncoupled and electronically controlled CO and FO, 2) low active and passive sensitivities, and 3) a very good frequency stability factor. The feasibility of the proposed oscillator has been demonstrated by SPICE simulation with TSMC 0.18 μm process parameters
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