Title :
Power dependence of feedback amplifiers on opamp architecture
Author :
Katyal, Vipul ; Lin, Yu ; Geiger, Randall L.
Author_Institution :
Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
Power optimized design strategies for operational amplifiers (opamps) used in finite gain feedback applications with fixed closed-loop settling constraints are introduced. A comparison of several operational amplifier architectures shows that the optimal amplifier architecture is dependent upon the desired closed-loop gain. Closed form expressions are given which relate power dissipation and closed loop bandwidth for a given closed loop gain.
Keywords :
circuit optimisation; closed loop systems; feedback amplifiers; operational amplifiers; power consumption; closed loop bandwidth; closed-loop gain; feedback amplifiers; finite gain feedback applications; fixed closed-loop settling constraints; opamp architecture; operational amplifier architectures; power dependence; power dissipation; Bandwidth; Computer architecture; Design optimization; Feedback amplifiers; Negative feedback; Negative feedback loops; Operational amplifiers; Parasitic capacitance; Power amplifiers; Power dissipation;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464913
