Title :
A 1.8-V 73-dB dynamic-range CMOS variable gain amplifier
Author :
Saito, Ryutaro ; Hosoda, Kinya ; Hyogo, Akira ; Maruyama, Takaya ; Komuraki, Hiroshi ; Sato, Hisayasu ; Sekine, Keitaro
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ. of Sci., Chiba, Japan
Abstract :
A linear-in-dB VGA is fabricated in 0.18-/spl mu/m CMOS technology. It is composed of three cascaded VGAs. Each of them is based on a conventional VGA and a proposed gain control circuit. To avoid devices parameters and temperature behaviour on gain characteristics of VGA, a bias circuit is adapted to a proposed gain control circuit. The gain range of 73dB, the gain error of within /spl plusmn/2dB, the NF of 5dB are obtained at 380MHz by measurement, and the maximum current consumption is 6 mA under a single 1.8V power supply.
Keywords :
CMOS integrated circuits; amplifiers; cascade systems; gain control; low-power electronics; 0.18 microns; 1.8 V; 380 MHz; 5 dB; 6 mA; 73 dB; CMOS technology; CMOS variable gain amplifier; bias circuit; cascaded VGA; conventional VGA; device parameters; gain characteristics; gain control circuit; linear-in-dB VGA; temperature behaviour; CMOS technology; Circuits; Communication system control; Diodes; Gain control; MOSFETs; Noise measurement; Radio control; Virtual colonoscopy; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257132
