Title :
A variable gain CMOS amplifier with exponential gain control
Author :
Mangelsdorf, C.W.
Author_Institution :
Analog Devices, Tokyo, Japan
Abstract :
A variable gain amplifier architecture suitable for foundry CMOS is constructed using linearized transconductance blocks. The use of a four-transistor transconductance cell allows for wider gain range and larger signal swing under low supply conditions than the simple differential pair used in previous work. Experimental results with 0.6 /spl mu/m CMOS show -5 to 35 dB gain and 20 MHz bandwidth at 21 mW.
Keywords :
Amplifiers; CMOS analog integrated circuits; Gain control; Integrated circuit design; 0 to 35 dB; 0.6 micron; 20 MHz; 21 mW; exponential gain control; four-transistor transconductance cell; gain range; linearized transconductance blocks; low supply conditions; signal swing; variable gain CMOS amplifier; variable gain amplifier architecture; Adaptive signal processing; Bandwidth; Capacitors; Diodes; Foundries; Gain control; Linearity; Transconductance; Transconductors; Voltage;
Conference_Titel :
VLSI Circuits, 2000. Digest of Technical Papers. 2000 Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-6309-4
DOI :
10.1109/VLSIC.2000.852875
