Title :
A 70dB SFDR CMOS transconductor
Author :
Lopez-Martin, Antonio J. ; Carvajal, Ramon G. ; Ramirez-Angulo, Jaime
Author_Institution :
Dept. of Electr. & Electron. Eng., Navarra Public Univ., Pamplona, Spain
fDate :
28 Aug.-2 Sept. 2005
Abstract :
A CMOS transconductor suitable for very low distortion analog signal processing over a rail-to-rail input range is presented. Very low impedance virtual ground nodes obtained by local negative feedback allow a highly linear voltage to current conversion by passive resistors. Low mismatch sensitivity is achieved as the current generated in the resistors is not internally replicated. Measurement results for a 0.5μm CMOS prototype show a spurious-free dynamic range at 1MHz higher than 70dB for a 6Vpp input and a dual supply of ±1.5V.
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; 0.5 micron; 1 MHz; 6 V; CMOS transconductor; low distortion analog signal processing; mismatch sensitivity; passive resistor; rail-to-rail input range; virtual ground node; voltage-to-current conversion; CMOS process; Distortion measurement; Impedance; Negative feedback; Prototypes; Rail to rail inputs; Resistors; Signal processing; Transconductors; Voltage;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523030
