Title :
0.8V bulk-driven variable gain amplifier
Author :
Raikos, George ; Vlassis, Spyridon
Author_Institution :
Phys. Dept., Univ. of Patras, Patras, Greece
Abstract :
A low-voltage variable gain amplifier based on PMOS bulk-driven input stage is presented in this paper. The gain of the proposed amplifier has a linear in-dB gain dependency since it utilizes the conventional pseudo exponential approximation function (1+x)/(1-x). The master-slave technique is used in order to control the voltage gain. The amplifier is designed with a supply voltage of 0.8V featuring a gain range equal to 17dB with less than ±0.5dB linearity error. A standard 0.18μm CMOS process has been chosen to simulate and test the VGA topology confirming the theoretical analysis.
Keywords :
CMOS analogue integrated circuits; MOSFET; amplifiers; PMOS bulk-driven input stage; VGA topology; bulk-driven variable gain amplifier; gain 17 dB; pseudo exponential approximation function; size 0.18 mum; standard CMOS process; voltage 0.8 V; Topology; Transistors; VGA circuit; bulk-driven transistor; master-slave technique;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724524
