Title :
Operational amplifier modelling for high speed sampled data applications
Author :
Makris, C.A. ; Toumazou, Christofer
Author_Institution :
Dept. of Electr. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
10/1/1990 12:00:00 AM
Abstract :
A pair of symmetrical and versatile equivalent circuits suitable for two pole single and two stage operational amplifiers is presented. The improved accuracy of the new equivalent circuits is necessary when designing the compensation network of high speed amplifiers to minimise their very strongly phase-dependent settling time, which is important for sampled data analogue signal processing circuits. These models also identify a critical effective capacitance, which is shown to govern the settling behaviour of the operational amplifier
Keywords :
equivalent circuits; operational amplifiers; poles and zeros; sampled data systems; signal processing equipment; GaAs operational amplifier; compensation network; critical effective capacitance; high speed sampled data; operational amplifier; phase-dependent settling time; sampled data analogue signal processing circuits; symmetrical equivalent circuits; two pole single operational amplifier; two stage operational amplifiers; versatile equivalent circuits;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings G
