Title :
A 125 MHz-86 dB IM3 programmable-gain amplifier
Author :
Cheng-Chung Hsu ; Jieh-Tsorng Wu
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan
Abstract :
A digitally programmable-gain amplifier (PGA) is realized using a 0.35 /spl mu/m CMOS technology. Constant bandwidth and high linearity are achieved by using a current-mode amplifier with resistor-network feedback. The PGA has a voltage gain varying from 0 dB to 19 dB with a bandwidth of 125 MHz. With 1 Vpp output, the third-order intermodulation (IM3) of the PGA is -86 dB at 10 MHz and -59 dB at 80 MHz. The distortion is also insensitive to the gain change. The circuit dissipates 21 mW from a 3.3 V supply.
Keywords :
CMOS analogue integrated circuits; current-mode circuits; feedback amplifiers; gain control; programmable circuits; wideband amplifiers; 0 to 19 dB; 0.35 micron; 125 MHz; 21 mW; 3.3 V; CMOS technology; constant bandwidth; current-mode amplifier; digitally programmable-gain amplifier; high linearity; resistor-network feedback; voltage gain variation; Artificial intelligence; Bandwidth; CMOS technology; Circuits; Electronics packaging; Feedback; Linearity; Operational amplifiers; Resistors; Voltage;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2002. Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-7310-3
DOI :
10.1109/VLSIC.2002.1015035
