Title :
A 1-V 25-dB 100-MHz CMOS variable gain amplifier cell
Author :
Naktongkul, P. ; Thanachayanont, A.
Author_Institution :
Dept. of Electron. Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
This paper proposes a novel low-voltage, low-power wide-bandwidth variable gain amplifier (VGA) cell. The proposed circuit combines source degeneration and current-mode techniques to achieve high linearity and constant bandwidth. Using a 0.35-μm CMOS process and dissipating 84 μW from a 1-V supply voltage, the proposed VGA cell can have a voltage gain varying from 0 dB to 25-dB DC gain while maintaining a constant bandwidth of 100-MHz.
Keywords :
CMOS analogue integrated circuits; current-mode circuits; low-power electronics; wideband amplifiers; 0 to 25 dB; 0.35 micron; 1 V; 100 MHz; 84 muW; CMOS process; constant bandwidth; current-mode techniques; linearity; low-power amplifier; low-voltage amplifier; source degeneration; variable gain amplifier cell; wide-bandwidth amplifier; Bandwidth; Circuits; Differential amplifiers; Gain; Linearity; Negative feedback; Power engineering and energy; Resistors; Transconductance; Voltage;
Conference_Titel :
Communications and Information Technology, 2004. ISCIT 2004. IEEE International Symposium on
Print_ISBN :
0-7803-8593-4
DOI :
10.1109/ISCIT.2004.1412901
