Title :
A High Speed Pseudo-Differential OTA with Mobility Compensation Technique in 1-V Power Supply Voltage
Author :
Lo, Tien-Yu ; Hung, Chung-Chih
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu
Abstract :
This paper presents a high linearity operational transconductance amplifier (OTA) based on pseudo-differential structures. The linearity is improved by mobility compensation techniques as the device size is scaled down to achieve high speed operation. Transconductance tuning could be achieved by a MOS operating in the linear region. The OTA fabricated in the TSMC 0.18-mum CMOS process occupies a small area of 4.5 times 10-3 mm2. The measured third-order inter-modulation (IM3) distortion under 1-V power supply voltage remains below -52 dB up to 50 MHz for a 400 mV pp differential input. The static power consumption is 2.5 mW. Experimental results demonstrate the agreement with theoretical analyses.
Keywords :
CMOS analogue integrated circuits; VLSI; carrier mobility; circuit tuning; compensation; differential amplifiers; high-speed integrated circuits; intermodulation distortion; operational amplifiers; MOS operation; OTA fabrication; TSMC CMOS process; analog VLSI applications; high linearity operational transconductance amplifier; high speed pseudo-differential OTA; mobility compensation technique; power 2.5 mW; power supply voltage conditions; size 0.18 mum; static power consumption; third-order inter-modulation distortion; transconductance tuning; voltage 1 V; voltage 400 mV; Circuits; Energy consumption; Harmonic distortion; High power amplifiers; Linearity; Operational amplifiers; Power engineering and energy; Power supplies; Transconductance; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2006. ASSCC 2006. IEEE Asian
Conference_Location :
Hangzhou
Print_ISBN :
0-7803-9734-7
Electronic_ISBN :
0-7803-97375-5
DOI :
10.1109/ASSCC.2006.357876
