Title :
High-performance CMOS current feedback operational amplifier
Author :
Pennisi, Salvatore
Author_Institution :
Dipt. Elettrico Elettronico e dei Sistemi, Catania Univ., Italy
Abstract :
The higher speed exhibited by the current-feedback opamp, compared to conventional architectures, is mainly due to the superior slew-rate, whereas the constant closed-loop bandwidth relies on a low input resistance value. This last requirement was revealed as the principal obstacle to the development of efficient CMOS implementations. A high-performance and robust CMOS current-feedback operational amplifier is proposed in this paper. It is obtained through a feedback configuration, which provides low input resistance and, working in class AB, allows high slew-rate capability. A design using a 0.35-μm process is given and SPICE simulations confirming the overall good performance are also provided.
Keywords :
CMOS analogue integrated circuits; circuit feedback; operational amplifiers; 0.35 micron; 5.36 mW; 74 dB; CMOS operational amplifier; class AB operation; constant closed-loop bandwidth; current feedback operational amplifier; high slew-rate capability; low input resistance; Bandwidth; Differential amplifiers; Feedback; Manufacturing; Operational amplifiers; Robustness; SPICE; Transistors; Variable structure systems; Voltage;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464902
