Abstract
Class AB amplifiers contribute to minimize power in several ways: on the one hand by decoupling the large signal (i.e. slew rate and current through the load resistor), and small signal (i.e. stability) requirements on the output stage; on the other hand by reducing quiescent current consumption when the signal to be processed, as in this case the cardiac signal, is “active” during only a small part of the system cycle. When a class A amplifier is applied, as was the case of the pacemaker sense channel described in Chapter 2, the class A bias current, which is consumed permanently, must be dimensioned according to the output current demand when a large signal is applied. However, this large signal is only present during a very small part of the system cycle.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2004 Springer Science+Business Media New York
About this chapter
Cite this chapter
Silveira, F., Flandre, D. (2004). Class AB Micropower Operational Amplifiers. In: Low Power Analog CMOS for Cardiac Pacemakers. The Springer International Series in Engineering and Computer Science, vol 758. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-5683-8_5
Download citation
DOI: https://doi.org/10.1007/978-1-4757-5683-8_5
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-5419-0
Online ISBN: 978-1-4757-5683-8
eBook Packages: Springer Book Archive