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Design third order sinusoidal oscillator employing current differencing cascaded trans conductance amplifiers
(2023) Mohammed, Arsen Ahmed; Demirel, Hüseyin
In this study, the realization of a quadrature sinusoidal oscillator of third order was described. The Current Differencing Cascaded Transconductance Amplifier (CDCTA), a single active building block, was employed in this design in conjunction with three grounded passive capacitors. The suggested circuit's simple architecture provides it with a good candidate for inclusion in integrated circuits. The oscillator under examination may provide a 90° phase difference between two sinusoidal impulses. High impedance output current nodes made it possible to cascade them in a current-mode circuit without the need for current buffers since they were suitable for cascading. Moreover, the circuit only uses 1 mW of power, has a maximum sensitivity of 0.5, and oscillates at a frequency of up to 4.99 MHz Additionally, both its oscillation frequency and condition may be electrically and independently adjusted. The theoretical analysis of the circuit was confirmed by the results of computer simulation using 45 nm gpdk cadence virtuoso program.