A 2.4-GHz 43-dB CMOS logarithmic amplifier for RF signal level detection

Author

Wongnamkam, S. ; Thanachayanont, A. ; Krairiksh, M.

Author_Institution

Nat. Electron. & Comput. Technol. Center, Pathumthani

Volume

2

fYear

2008

fDate

14-17 May 2008

Firstpage

725

Lastpage

728

Abstract

This paper describes the design and implementation of a 2.4-GHz fully-differential logarithmic amplifier for RF signal power detection. A novel self-bias wideband amplifier without on-chip inductor is employed as a limiting amplifier stage. The proposed logarithmic amplifier is realized and fabricated in a 0.35-mum CMOS technology. Measurement results showed that the circuit achieved 43-dB voltage gain, while drawing 73.5 mA from a single 2.5-V power supply voltage.

Keywords

CMOS integrated circuits; UHF amplifiers; UHF integrated circuits; differential amplifiers; signal detection; wideband amplifiers; CMOS logarithmic amplifier; RF signal level detection; current 73.5 mA; frequency 2.4 GHz; fully-differential logarithmic amplifier; gain 43 dB; on-chip inductor; self-bias wideband amplifier; size 0.35 mum; voltage 2.5 V; Broadband amplifiers; CMOS technology; Circuits; Gain measurement; Inductors; Power amplifiers; Power measurement; Radiofrequency amplifiers; Signal design; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2008. ECTI-CON 2008. 5th International Conference on

Conference_Location

Krabi

Print_ISBN

978-1-4244-2101-5

Electronic_ISBN

978-1-4244-2102-2

Type

conf

DOI

10.1109/ECTICON.2008.4600533

Filename

4600533