Intelligent GA optimizer for single supply operational amplifier and MMIC low noise amplifier


  • Neoh Siew Chin
  • Izatul Syafina Ishak
  • Lim Wei Jer
  • Arjuna Marzuki



Single-Supply Op-Amp, MMIC LNA, Genetic Algorithm, Optimization


Single-Supply Operational Amplifier (Op-Amp) is important to the applications on battery-powered equipments whereas MMIC Low Noise Amplifier (LNA) is a type of integrated circuit device used in capturing operating signal in microwave frequency. This paper presents an optimization study of a Single-Supply Op-Amp and a MMIC LNA using Genetic Algorithm (GA). GA is proposed to optimize multiple input variables so as to achieve the required circuit design outputs. In Single-Supply Op-Amp, a single objective GA optimization study is conducted. Based on the single objective circuit design justification, GA is further investigated for its capability to deal with multiple design objectives in 5 GHz MMIC LNA. In this research, the Single-Supply Op-Amp design is synthesized via LTSpice whereas the MMIC LNA design is simulated through Agilent Advanced Design System (ADS). The optimization performance of GA for both single and multi-objective circuit designs is studied and the developed multi-objective GA optimizer is further compared with ADS built-in optimizers of Gradient and Quasi-Newton respectively. From the results, GA is shown to be capable in optimizing both single objective Op-Amp and multi-objective LNA.


Nigel P.Cook, Electronics A Complete Course (2nd Edition), Upper Saddle River, New Jersey Pearson Prentice Hall, 2004, 541-591.

B.L David, S.S Franz and F.V Guillermo, Multimedia Tutorial on Operational Amplifier, Fundamental and Application, Department de Ingeneria Electronica, Universidad de Las Americas-Puebla, Mexico, 1998.

K. H. Lundberg, Internal and External Op-Amp Compensation: A Control-Centric Tutorial, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, 2004.

S. Marsh, Practical MMIC Design, Artech House, 2006.

I. D. Robertson and S. Lucyszyn, IET Circuits, Devices, and System Series 13, 2001.

N. Arthur, R. Tamer, and M. Yehia, Journal of Analog Integrated Circuits and Signal Processing, 55 (2008) 189.

N. Trung-Kien, K. Chung-Hwan, I. Gook-Ju, Y. Moon-Su, and L. Sang-Gug, 52 (2004) 1433.

M.B. Fallahpour, K.D. Hemmati, A. Pourmohammad, and A. Golmakani, Proceedings of the International Conference on Electrical Engineering and Informatics, (2011) 1.

M. Gen, and R. Cheng, Genetic Algorithms and Engineering Optimization. John Wiley & Sons Inc., New York, 2000.

Charles Kitchin, Demystifying Single-Supply Op-Amp Design, Analog Devices Inc, (2002). Available website:

H.L. Randy and H.E. Sue, Practical Genetic Algorithms, A Wiley-Interscience Publication, John Wiley & Sons, Inc. (2004), 129.

K.Rahul, V.Harsh, S.Anupam, T.Ritu, IJSCI International Journal of Computer Science, 2 (2010) 16.

A.A Majida, N.I Ahmad, M.H. Zubadi., International Journal of Computer and Electrical Engineering, 2 (2010) 1793.

C.Alejandro, G.Andres, L.Camilo, SAS Global Forum (2011), 149.

G.K. Asha, A.S Manjunath, M.A Jayaram, International Journal on Soft Computing (IJSC), 2 (2011) 15.

S.C. Neoh, N. Morad, A. Marzuki, C.P. Lim, and Z.A. Aziz, Innovations in Swarm Intelligence, Springer, 2009, 121.