Title :
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
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;
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
DOI :
10.1109/ECTICON.2008.4600533
