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Quadrature Oscillator Design with G_{m}-C Structure

100%
Konal M., Yeşıl A., Kaçar F.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
1013-1015
EN
This paper presents an attractive and new quadrature oscillator based on G_{m}-C structure. The proposed quadrature oscillator is achieved with MOS transistors and two capacitors. The passive capacitors are grounded, which is an advantage for integrated circuit implementation. The theoretical results are verified by LTSPICE simulation using the 0.18 μm CMOS technology from TSMC. The proposed quadrature oscillator circuit can be used in several communication and instrumentation systems.
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Electronically Tunable Quadrature Oscillator Employing Single Differential Difference Transconductance Amplifier

100%
Yesil A., Konal M., Kacar F.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
843-845
EN
In this paper, we present new voltage mode quadrature oscillator, employing single differential difference transconductance amplifier. The proposed oscillator structure consists of two grounded capacitors and a single resistor. The use of grounded capacitors is particularly attractive for integrated circuit implementation. In this way, the frequency of oscillations can be controlled by the biasing current of transconductance stage. Simulation results agree quite well with the theoretical analysis.
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