Title :
Amplifier structure for high gain and fast settling applications
Author :
Hashim, A.E. ; Geiger, R.L.
Author_Institution :
Iowa State Univ., Ames, IA, USA
Abstract :
High gain amplifiers with fast settling times are needed for high-speed data converter applications. A cascaded amplifier architecture is discussed that can make use of several architecturally identical amplifies to achieve the desired gain. Only one of the amplifiers has a gain-bandwidth product requirement that is modestly higher than the rest to keep the overall structure stable in the presence of negative feedback. The performance of a three-amplifier cascade is compared with that of single amplifier performance for applications at the 10-22 bit level range when used as an inverting amplifier with a gain of -1
Keywords :
SPICE; cascade networks; circuit simulation; circuit stability; feedback amplifiers; poles and zeros; PSpice simulations; architecturally identical amplifies; cascaded amplifier architecture; closed loop pole-zero plot; fast settling times; feedback configuration; gain-bandwidth product requirement; high gain amplifiers; high-speed data converter applications; inverting amplifier; negative feedback; structure stability; three-amplifier cascade; Bandwidth; Circuits; Feeds; Filters; Frequency; Negative feedback; Operational amplifiers; Performance gain; Stability criteria; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1011480
