Design of CMOS class-E power amplifier for WLAN and bluetooth applications

Author

Manikandan, P. ; Mathew, Ribu

Author_Institution

Dept. of Electron. & Commun., Karunya Univ., Coimbatore, India

fYear

2012

fDate

15-16 March 2012

Firstpage

81

Lastpage

88

Abstract

A class-E power amplifier with modified driver for WLAN and Bluetooth applications is presented in this paper. It is shown that a parallel class-E power amplifier gives better output power at minimum input power levels compared to a conventional class-E power amplifier. A new modified driver stage is proposed which drives the power amplifier efficiently. Negative capacitance concept is implemented to reduce parasitic capacitances at the driver output node to shape the driver output voltage. The negative capacitance is implemented without external circuit and the driver circuit is fed with less than 5dBm input power at 2.4GHz operating frequency. The power amplifier gain is more than 20dBm with 40% PAE at 2.4GHz. The power amplifier and the modified driver circuitry were implemented in 0.18-μm UMC CMOS technology using Cadence tool.

Keywords

Bluetooth; CMOS analogue integrated circuits; capacitance; driver circuits; integrated circuit design; power amplifiers; wireless LAN; CMOS class-E power amplifier; PAE; UMC CMOS technology; WLAN applications; bluetooth applications; cadence tool; conventional class-E power amplifier; driver output node; driver output voltage; driver stage; efficiency 40 percent; external circuit; frequency 2.4 GHz; input power level; modified driver circuitry; negative capacitance concept; operating frequency; output power level; parallel class-E power amplifier; parasitic capacitances; power amplifier gain; size 0.18 mum; CMOS integrated circuits; CMOS technology; Capacitance; Logic gates; Wireless LAN; CMOS class-E power amplifier; Driver circuit; Negative- capacitance; Parallel class-E power amplifier; Switching driver;

fLanguage

English

Publisher

ieee

Conference_Titel

Devices, Circuits and Systems (ICDCS), 2012 International Conference on

Conference_Location

Coimbatore

Print_ISBN

978-1-4577-1545-7

Type

conf

DOI

10.1109/ICDCSyst.2012.6188679

Filename

6188679