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Dergiler / Balkan Journal of Electrical and Computer Engineering / 2026 / Cilt: 8 Sayı: 2

Nested Miller Compensation Based Op-Amp Design for Piezoelectric Actuators

Dincer Gokcen(Hacettepe University)0000-0003-1847-1356
Mehmet Akif Çelik(Hacettepe University)0000-0001-5119-8705
Fatih Emre Aydos(Hacettepe University)0000-0002-6726-4567
Sayfa
186–192
Yayın Tarihi
2020-04-30
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

According to simulation results, the proposed op-amp has a slew rate of 0.5 V/μs, an open loop gain of 90dB with 3MHz Gain Bandwidth Product (GBP) and phase margin of 77°, and a common mode rejection ratio (CMRR) of 62dB.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:This study introduces the design of a practical three-stage operational amplifier (op-amp) using nested Miller compensation, particularly for piezoelectric actuators.
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Temel Bulgular & Veri:However, using a large capacitor causes a decrease in the slew rate and gain bandwidth.
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Sonuç & Katkı:According to simulation results, the proposed op-amp has a slew rate of 0.5 V/μs, an open loop gain of 90dB with 3MHz Gain Bandwidth Product (GBP) and phase margin of 77°, and a common mode rejection ratio (CMRR) of 62dB.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Operational Amplifier · Stability · Piezoelectric

Abstract

This study introduces the design of a practical three-stage operational amplifier (op-amp) using nested Miller compensation, particularly for piezoelectric actuators. Driving a piezoelectric actuator represents a challenge in amplifier design due to its large capacitive nature. A stable piezo driver needs to be free of oscillations and phase lag. Direct feedback compensation using a conventional Miller capacitor is an effective method as long as the capacitance of the load is considerably close to the value of the Miller capacitor. However, using a large capacitor causes a decrease in the slew rate and gain bandwidth. To avoid this, our design focused on the utilization of nested Miller compensation technique. A prototype of the design working at 100V peak to peak voltage (V pp ) is implemented using commercial off-the-shelf (COTS) components. The measurements show the successful driving capability and step-response of the op-amp design. In the design, Widlar current source is also utilized for thermal stability and short circuit protection. According to simulation results, the proposed op-amp has a slew rate of 0.5 V/μs, an open loop gain of 90dB with 3MHz Gain Bandwidth Product (GBP) and phase margin of 77°, and a common mode rejection ratio (CMRR) of 62dB.

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Bu Makaleye Atıf Yap

Gokcen, D., Çelik, M. A., Aydos, F. E. (2020). Nested Miller Compensation Based Op-Amp Design for Piezoelectric Actuators. Balkan Journal of Electrical and Computer Engineering, Cilt: 8 Sayı: 2, 186–192. https://doi.org/10.17694/bajece.585798

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Kaynakça (21)

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