RF Power Amplifier with High Efficiency and Digital Gain Control

Andi Dwiki Yulianto, Ikhsan Hidayat

Abstract


Radio Frequency (RF) power amplifiers are crucial components in wireless communication systems. They are responsible for amplifying signals to levels suitable for transmission while maintaining linearity and efficiency. However, as communication systems demand higher data rates and lower power consumption, efficiency and gain control become primary design challenges. This paper presents a two-stage CMOS operational amplifier topology featuring high gain, low power consumption, and digital gain control mechanisms. Through circuit optimization and Miller compensation, the proposed design achieves an improved phase margin and maintains high CMRR performance, making it suitable for biomedical sensing applications.

Keywords


RF amplifier; High efficiency; Digital gain control; CMOS design; Analog integrated circuit;

Full Text:

PDF

References


Cripps, S. C. (2020). RF Power Amplifiers for Wireless Communications. Artech House.

Pozar, D. M. (2021). Microwave Engineering (5th ed.). Wiley.

Sedra, A. S., & Smith, K. C. (2022). Microelectronic Circuits (8th ed.). Oxford University Press.

Grebennikov, A. (2020). High-Efficiency Load Modulated RF Power Amplifiers. Springer.

Raab, F. H., et al. (2021). RF and Microwave Power Amplifier Technology. IEEE Transactions on Microwave Theory and Techniques, 69(5), 2304–2318.

W. Lee, M.-C. Cho, and S. Cho, “Cmrr enhancement technique for ia using three ias for bio-medical sensor applications,” in 2010 IEEE Asia Pacific Conference on Circuits and Systems, 2010, pp. 248–251..

F. Silveira, D. Flandre, and P. Jespers, “A g/sub m//i/sub d/ based methodology for the design of cmos analog circuits and its application to the synthesis of a silicon-on-insulator micropower ota,” IEEE Journal of Solid-State Circuits, vol. 31, no. 9, pp. 1314–1319, 1996.

Yu, C., & Liu, H. (2023). Digitally controlled gain amplifiers for low-voltage CMOS applications. Microelectronics Journal, 134, 105416.

Xu, L., et al. (2023). Adaptive gain control for RF amplifiers. IEEE Access, 11, 45600–45609.

Kang, S. M., & Leblebici, Y. (2020). CMOS Digital Integrated Circuits (4th ed.). McGraw-Hill.

Hasler, P., & Paulos, J. (2022). Stability analysis of two-stage amplifiers with compensation networks. Analog Integrated Circuits and Signal Processing, 111(3), 477–489.

Razavi, B. (2021). Design of Analog CMOS Integrated Circuits (2nd ed.). McGraw-Hill.

Maheshwari, S., et al. (2024). Low-noise CMOS amplifier design for biosensing. Biomedical Signal Processing and Control, 90, 105789.

Franco, S. (2021). Design with Operational Amplifiers and Analog Integrated Circuits (5th ed.). McGraw-Hill.

Park, H., & Choi, D. (2023). Noise optimization in CMOS amplifiers for sensor applications. Sensors and Actuators A: Physical, 360, 114492.


Refbacks

  • There are currently no refbacks.


Copyright (c) 2025 International Journal of Embedded Computer Engineering

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.