An ultra low power OTA with improved unity gain bandwidth product

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概要

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• An operational transconductance amplifier (OTA) using dynamic threshold MOS (DTMOS) and hybrid compensation technique is presented in this paper. The proposed topology is based on a bulk and gate driven input differential pair. Two separate capacitors are employed for the OTA compensation where one of them is used in a signal path and the other one in a non-signal path. The circuit is designed in the 0.18μm CMOS TSMC technology. The proposed design technique shows remarkable enhancement in unity gain-bandwidth and also in DC gain compared to the bulk driven input differential pair OTAs. The Hspice simulation results show that the amplifier has a 92dB open-loop DC gain and a unity gain-bandwidth of 135kHz while operating at 0.4V supply voltage. The total power consumption is as low as 386nW which makes it suitable for low-power bio-medical and bio-implantable applications.

著者

• Kouzani Abbas

  School of Engineering, Deakin University

• Mafinezhad Khalil

  Sadjad Institute of Higher Education

• Zoka Negar

  Department of Electrical Engineering, Ferdowsi University

• Kargaran Ehsan

  Sadjad Institute of Higher Education

• Mafinejad Yasser

  School of Engineering, Deakin University

• Mafinezhad Khalil

  Sadjad Higher Education Institute

関連論文

• An ultra low power OTA with improved unity gain bandwidth product
• Highly Linear Low Voltage Low Power CMOS LNA

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