Title :
High-gain and high-bandwidth rail-to-rail operational amplifier with slew rate boost circuit
Author :
Huang, Hong-Yi ; Wang, Bo-Ruei ; Liu, Jen-Chieh
Author_Institution :
Dept. of Electr. Eng., Fu-Jen Catholic Univ., Taipei
Abstract :
In this work, a high gain and high bandwidth rail-to-rail operational amplifier with slew rate boost circuit is presented. The constant gm is enhanced through a source-to-bulk bias control of an input pair. A source degeneration scheme is applied to realize an input common-mode range insensitive output stage. Several compensation schemes are applied to maintain the stability. A slew rate boost circuit can improve the output slewing. The op amp performs 100-dB dc gain, 100-MHz bandwidth and 22.5-V/us slew rate at 15-pF output load. The layout area is 593times519 mum2 in a 0.18-mum CMOS process. It consumes 3.2-mW at 1.8V supply voltage
Keywords :
CMOS integrated circuits; VHF amplifiers; compensation; operational amplifiers; 0.18 micron; 1.8 V; 100 MHz; 100 dB; 15 pF; 3.2 mW; 519 micron; 593 micron; CMOS process; high bandwidth; high gain; rail-to-rail operational amplifier; slew rate boost circuit; source degeneration scheme; source-to-bulk bias control; Bandwidth; Circuit stability; Equations; Operational amplifiers; Performance gain; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Rail to rail outputs; Voltage;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692733
