Mixed-Mode Third-Order Quadrature Oscillator Based on Single MCCFTA

Abstract

Abstract. This paper presents a new mixed-mode third KeywordsThird-order quadrature oscillator, mixed-mode oscillator, modified current-controlled current follower transconductance amplifier (MCCFTA)

Third‐order quadrature sinusoidal oscillators with fully uncoupled tuning laws using only two CFOAs and grounded capacitors

“…Of late, there also has been considerable research effort on third‐order oscillators since they are expected to provide high‐quality waveforms with low harmonic distortion 2,3 . Consequently, many authors have proposed third‐order quadrature oscillators using a variety of active building blocks (ABB) such as op‐amps, operational transconductance amplifiers (OTA), current differencing transconductance amplifiers (CDTA), multiple‐input second‐generation current conveyors (MOCCII), current differencing buffered amplifiers (CDBA), operational transresistance amplifiers (OTRA), voltage differencing buffered amplifiers (VDBA), differential voltage current conveyors (DVCC), differential difference current conveyors (DDCC), current controlled current conveyors (CCCII), voltage differencing transconductance amplifiers (VDTA), multiple‐output current controlled current conveyor transconductance amplifiers (MOCCCCTA), modified current following transconductance amplifiers (MCFTA), current‐controlled current conveyor transconductance amplifiers (CCCCTA), differential voltage current conveyor transconductance amplifiers (DVCCTA), voltage differencing inverting buffered amplifiers (VDIBA), fully differential second‐generation current conveyors (FDCCII), voltage differencing current conveyors (VDCC), and many more 4–51 …”

“…With the exception of previous works, 4–7 which use only a single ABB, all the quoted third‐order quadrature oscillators (TOSO) have been devised using two to five ABBs. It is obvious that any of the single‐ABB‐based TOQSOs would not be able to provide two quadrature voltage output signals both from low output impedance nodes.…”

Systematic realization of low‐frequency third‐order sinusoidal oscillators

“…16,17,50 • A combination of an inverting lossy integrator with two lossless noninverting integrators in a loop. 15,[24][25][26] • A cascade connection of two noninverting lossy integrators and one lossless inverting integrator with unity feedback. 15,27,28 • A cascade connection of three lossy integrators in a unity negative feedback loop.…”