Design of a Low-Power Compact CMOS Variable Gain Amplifier for Modern RF Receivers

MdMohammad Arif Sobhan Bhuiyan, Mamun Bin Ibne Reaz, Md Torikul Islam Badal, Noorfazila Kamal

Abstract


Variable gain amplifier (VGA) is one of the most vulnerable elements of every modern receiver for the proper baseband processing of the signal. CMOS VGAs are generally suffered from low bandwidth and small gain range. In this research, a two-stage class AB VGA, each stage comprising of a direct transconductance amplifier and a linear transimpedance amplifier, is designed in Silterra 0.13-µm CMOS utilizing Mentor Graphics environment. The post-layout simulation results reveal that the VGA design achieves the widest bandwidth of >200 MHz and high gain range from -33 to 32 dB. The VGA dissipates only 2mW from a single 1.2 V DC supply. The core chip area of the VGA is also only 0.026 mm2 which is also the lowest compared to recent researches.


Keywords


CMOS, RF, VGA, receiver.

References


Badal TI, Reaz MBI, Bhuiyan MAS,Kamal N. CMOS Transmitters for 2.4-GHz RF Devices: Design Architectures of the 2.4-GHz CMOS Transmitter for RF Devices, IEEE Microwave Magazine, 2019; 20: 38 - 61.

Bhuiyan MAS, Zijie Y, Yu JS, Reaz MBI, Kamal N, Chang TG. Active Inductor Based Fully Integrated CMOS Transmit/Receive Switch For 2.4 GHz RF Transceiver, Anais da Academia Brasileira de Ciências, 2016; 88: 1089-1098.

Rosli KA, Daud RM, Mamun M, Bhuiyan MAS. A comparative study on SOI MOSFETs for low power applications, Research Journal of Applied Sciences, Engineering and Technology, 2013; 5: 2586-2591.

Uddin MJ, Nordin AN, Reaz MBI, Bhuiyan MAS. A CMOS Power Splitter for 2.45 GHz ISM band RFID Reader in 0.18 µm CMOS Technology, Technical Gazette, 2013; 20: 125-129.

Asemani M, Ardeshir G, Razmjooei D. Improving Linearity Of CMOS Variable-Gain Amplifier Using Third-Order Intermodulation Cancellation Mechanism And Intermodulation Distortion Sinking Techniques, International Journal of Engineering, 2017; 30: 192-198.

Onet R, Neag M, Kovacs I, Topa MD, Rodriguez S, Rusu A. Compact Variable Gain Amplifier For A Multistandard WLAN/WiMAX/LTE Receiver, IEEE Transactions on Circuits and Systems I: Regular Papers, 2014; 61: 247-257.

Fu CT, Luong H. A CMOS Linear-in-dB High-Linearity Variable-Gain Amplifier For UWB Receivers, IEEE Solid-State Circuits Conference, 2007: 103-106.

Lee HD, Lee KA, Hong S. A Wideband CMOS Variable Gain Amplifier With An Exponential Gain Control, IEEE Transactions on Microwave Theory and Techniques, 2007; 55: 1363-1373.

Dongi M, Jalali M. A Wideband CMOS VGA with dB-Linear Gain Based on Active Feedback and Negative Capacitance, 25th Iranian Conference on Electrical Engineering (ICEE2017), 2017: 506-510.

Khumsat P, Thanachayanont A, Sakphrom S. A Compact Class-AB CMOS Variable Gain Amplifier, ECTI International Conference, 2007: 85-88.

He L, Li L, Zhao D, Wang Z. A Low-Power Wide Gain Range Digitally Controlled Variable Gain Amplifier with a Wide Tuning Bandwidth for 60 GHz Applications, IEEE 17th Annual Wireless and Microwave Technology Conference (WAMICON 2016), 2016: 1-4.

Liu H, Boon CC, He X, Zhu X, Yi X, Kong L, Heimlich MC. A Wideband Analog-Controlled Variable-Gain Amplifier With dB-Linear Characteristic for High-Frequency Applications, IEEE Transactions on Microwave Theory and Techniques, 2016; 64: 533-540.

Ghanavati B. Low-voltage High Dynamic Range CMOS Exponential Function Generator, Applied mathematics in Engineering, Management and Technology, 2015; 3: 250-256.

Qianqian L, Zhiming S, Yin C, Xiaojie C, Zheng G. CMOS Linear-in-dB VGA with DC Offset Cancellation For Direct-Conversion Receivers, Journal of Semiconductors, 2011; 32: 105007.

Elwan H, Tekin A, Pedrotti K. A Differential-Ramp Based 65 dB-Linear VGA Technique in 65 nm CMOS, IEEE Journal of Solid-State Circuits, 2009; 44: 2503-2514.

Yu YH, Yang YS, Chen YJE. A Compact Wideband CMOS Low Noise Amplifier With Gain Flatness Enhancement, IEEE Journal of Solid-State Circuits, 2010; 45: 502-509



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