Abstract
This paper presents a third-order quadrature sinusoidal oscillator (TOQSO) using two voltage differencing buffered amplifiers (VDBAs), three capacitors and a resistor. The new topology provides two quadrature voltage outputs. The condition of oscillation (CO) and frequency of oscillation (FO) are electronically independently controllable by the separate transconductance of the VDBAs. The workability of the proposed TOQSO is confirmed by SPICE (Version 16.5) simulation using Taiwan semiconductor manufacturing company (TSMC) 0.18 μm process parameters.
Highlights
An oscillator is a very important basic building block, which is frequently used in electrical and electronics engineering applications
This paper presents a third-order quadrature sinusoidal oscillator (TOQSO) using two voltage differencing buffered amplifiers (VDBAs), three capacitors and a resistor
SPICE generated output waveforms indicating transient and steady state responses of circuit of Figure 3 are shown in Figure 5 and Figure 6 respectively
Summary
An oscillator is a very important basic building block, which is frequently used in electrical and electronics engineering applications. Among several types of sinusoidal oscillators, the quadrature oscillators are widely used because they can offer sinusoidal signals with 90 ̊ phase difference, for example, in telecommunications for quadrature mixers and SSB generators [1], for measurement purposes in vector generators and selective voltmeters [2]. Because of these applications number of QSOs has been realized employing different active building blocks in the open literature [3]-[8]. The workability of the proposed configuration is verified by SPICE simulation using 0.18 μm TSMC technology transistor parameters
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