Title :
Low-voltage op amp design and differential difference amplifier design using linear transconductor with resistor input
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fDate :
8/1/2000 12:00:00 AM
Abstract :
This paper describes a 1-V wide-input range and high linearity transconductance input stage that uses poly resistor and input-impedance boosting technique. Using the proposed transconductor, an op amp and a differential difference amplifier (DDA) were implemented in a 1.2-μm CMOS process. The transconductor has a total harmonic distortion (THD) of less than -60 dB for an input swing of 400 mV at 10 kHz. The op amp and the DDA show a peak-to-peak output swing of 800 mV and a THD of less than -70 dB for an output swing of 600 mV at 10 kHz
Keywords :
CMOS analogue integrated circuits; differential amplifiers; harmonic distortion; integrated circuit design; low-power electronics; operational amplifiers; 1 V; 1.2 micron; 10 kHz; CMOS; THD; differential difference amplifier design; input swing; input-impedance boosting technique; linear transconductor; low-voltage opamp design; peak-to-peak output swing; poly resistor; resistor input; total harmonic distortion; CMOS process; Circuits; Differential amplifiers; Impedance; Linearity; Low voltage; Mirrors; Resistors; Transconductance; Transconductors;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
