Title :
High-gain high-speed operational amplifier in digital 120nm CMOS
Author :
Schlögl, F. ; Dietrich, H. ; Zimmermann, H.
Author_Institution :
Inst. for Electr. Meas. & Circuit Design, Vienna Univ. of Technol., Austria
Abstract :
A fully differential 6-stage 3-signal path operational amplifier in 0.12μm digital CMOS technology achieving a differential gain of 120dB at a supply voltage of 1.2V is presented. This operational amplifier uses only regular-threshold transistors. It uses two input stages to assure a sufficient phase margin. The use of six common-mode controllers leads to a good common-mode behavior and to an AB output-stage. A transit frequency of 866MHz and a phase margin of 36° at 1.2V supply with a load of 3.2pF have been measured.
Keywords :
CMOS digital integrated circuits; integrated circuit design; operational amplifiers; 1.2 V; 120 dB; 120 nm; 3.2 pF; 866 MHz; AB output-stage; common-mode behavior; common-mode controllers; differential gain; digital CMOS technology; high-gain operational amplifier; high-speed operational amplifier; threshold transistors; transit frequency; Analog circuits; CMOS technology; Capacitors; Differential amplifiers; Digital circuits; Frequency; Low voltage; Operational amplifiers; Power supplies; Threshold voltage;
Conference_Titel :
SOC Conference, 2004. Proceedings. IEEE International
Print_ISBN :
0-7803-8445-8
DOI :
10.1109/SOCC.2004.1362448
