Title :
Improved current-feedback op-amp with good DC and CMRR performance
Author :
Hayatleh, K. ; Su, W.J. ; Lidgey, F.J.
Author_Institution :
Dept. of Electron. Eng., Oxford Brookes Univ., UK
Abstract :
A novel high DC accuracy and high CMRR performance current-feedback op amp (CFOA) is presented. The conventional architecture CFOA suffers from poor DC gain accuracy and CMRR due mainly to Early effects in the input stages. The new design is based on a bootstrapping technique applied to the input stage, and results in a CFOA with DC performance, CMRR and gain accuracy all substantially improved. All of these improvements are obtained without increase in circuit complexity and power consumption. Most of the other characteristics of the new CFOA are similar to those of a conventional design
Keywords :
bipolar analogue integrated circuits; feedback amplifiers; operational amplifiers; CMRR performance; DC performance; bipolar XFCB process; bootstrapping technique; current-feedback op-amp; gain accuracy; input stage Early effects; Bandwidth; Circuit noise; Circuit simulation; Complexity theory; Degradation; Energy consumption; Operational amplifiers; Performance gain; Power amplifiers; Voltage;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780694
