Title :
Tuned LNA for RFICs using boot-strapped inductor
Author :
Albertoni, F. ; Fanucci, L. ; Neri, B. ; Sentieri, E.
Author_Institution :
Dipartimento di Ingegneria dell´Inf., Pisa Univ., Italy
Abstract :
In this paper, the principle of operation of a new type of active inductor and its application to a tuned LNA are described. The design is optimized at 1.8 GHz. An integrated transformer in connection with a current amplifier realizes a "boot-strapped" inductor with a L/spl times/Q factor never obtained before at this frequency. This way a selective LNA with a 60 MHz bandwidth, corresponding to a Q of 30, was designed. The circuit exhibits a matched noise figure of 1.8 dB with 25.5 dB transducer power gain while dissipating 20.7 mW from a 3 V power supply.
Keywords :
Q-factor; UHF amplifiers; UHF integrated circuits; bootstrap circuits; circuit tuning; inductors; 1.8 GHz; 1.8 dB; 20.7 mW; 25.5 dB; 3 V; 60 MHz; Q-factor; RFIC; bandwidth; bootstrapped active inductor; current amplifier; integrated transformer; noise figure; power gain; tuned LNA; Active inductors; Frequency; Impedance; Inductance; Magnetic separation; Parasitic capacitance; Q factor; Radiofrequency integrated circuits; Silicon; Spirals;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2001. Digest of Papers. 2001 IEEE
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6601-8
DOI :
10.1109/RFIC.2001.935648
