Abstract
A new current-mode sinusoidal oscillator employing a single voltage differencing transconductance amplifier (VDTA), two grounded capacitors, and one grounded resistor has been proposed. The proposed sinusoidal oscillator offers the following advantageous features: (i) use of grounded capacitors which are attractive from the view point of IC implementation as well as eliminating/accommodating parasitic capacitances, (ii) independent control of frequency of oscillation and condition of oscillation, (iii) ready availability of explicit current-mode output, (iv) low active and passive sensitivities, and (v) a very good frequency stability. The workability of the proposed configuration has been established by PSPICE simulations.
Highlights
In the synthesis of signal processing/signal generation circuits, current-mode (CM) operation has received much attention over the conventional voltage-mode (VM) operation due to its wider bandwidth and high linearity [1]
The purpose of this paper is to propose a new Explicit current-mode sinusoidal oscillators (ECMSOs) using a single voltage differencing transconductance amplifier (VDTA) along with three passive components, which offers (i) use of grounded capacitors which are attractive from the viewpoint of IC implementation as well as eliminating/accommodating parasitic capacitances, (ii) independent control of frequency of oscillation and condition of oscillation (iii) ready availability of explicit currentmode output, (iv) low active and passive sensitivities, and (v) a very good frequency stability
The transconductances of VDTA were controlled by bias currents
Summary
In the synthesis of signal processing/signal generation circuits, current-mode (CM) operation has received much attention over the conventional voltage-mode (VM) operation due to its wider bandwidth and high linearity [1]. Explicit current-mode sinusoidal oscillators (ECMSOs) based upon different active single building blocks are available in the literature; see [6–13] and the references cited therein. The purpose of this paper is to propose a new ECMSO using a single VDTA along with three passive components (two grounded capacitors and one grounded resistor), which offers (i) use of grounded capacitors which are attractive from the viewpoint of IC implementation as well as eliminating/accommodating parasitic capacitances, (ii) independent control of frequency of oscillation and condition of oscillation (iii) ready availability of explicit currentmode output, (iv) low active and passive sensitivities, and (v) a very good frequency stability. The workability of the new circuit has been verified by PSPICE simulations
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