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<p>Sinusoidal oscillators based on the three fundamental amplifiers, namely the operational amplifier, the operational transconductance amplifier, and the operational transresistance amplifier are very well established. This paper proposes new sinusoidal oscillators based on the fourth type, the operational current amplifier. Traditional applications use voltage-mode oscillators; however, several modern applications, such as electrical impedance spectroscopy, prefer current-mode oscillators. In the literature, many current-mode oscillators have been proposed; however, they use active building blocks that operate in both voltage and current modes. Experimental results obtained from a standard 150&#xa0;nm CMOS process are provided. It is shown that the proposed oscillators consume approximately 170&#xa0;µW while working in the MHz range.</p>

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Single Operational Current Amplifier-Based Sinusoidal Oscillators

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Hussain Alzaher,
  • Ibrahim Alkhalifa

摘要

Sinusoidal oscillators based on the three fundamental amplifiers, namely the operational amplifier, the operational transconductance amplifier, and the operational transresistance amplifier are very well established. This paper proposes new sinusoidal oscillators based on the fourth type, the operational current amplifier. Traditional applications use voltage-mode oscillators; however, several modern applications, such as electrical impedance spectroscopy, prefer current-mode oscillators. In the literature, many current-mode oscillators have been proposed; however, they use active building blocks that operate in both voltage and current modes. Experimental results obtained from a standard 150 nm CMOS process are provided. It is shown that the proposed oscillators consume approximately 170 µW while working in the MHz range.