Modeling and Simulation of an Instrumentation Amplifier in High Temperature Using a VHDL-AMS Op-Amp Model

Sahbi Baccar (1) , Timothée Levi (1) , Dominique Dallet (1) , François Barbara (2)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 EPS Schlumberger

In this paper, an “architectural” description of an instrumentation amplifier (in-amp) is used to simulate its common mode rejection ratio (CMRR) and voltage offset (VOS) in high temperature (HT). The simulations are achieved by using two different models of an industrial op-amp: the familiar SPICE macro-model and a customized VHDL-AMS model. By simulating these two parameters in HT, we evaluate in this work dependency between the op-amp model and the in-amp model. This dependency is described first by reviewing theoretical equations. We compare finally the VHDL-AMS simulation accuracy to the SPICE simulation accuracy in HT.

Domaines: Electronique

Sahbi Baccar, Timothée Levi, Dominique Dallet, François Barbara. Modeling and Simulation of an Instrumentation Amplifier in High Temperature Using a VHDL-AMS Op-Amp Model. 12th IEEE International New Circuits and Systems Conference (NEWCAS 2014), Jun 2014, Trois-Rivières, Canada. ⟨10.1109/NEWCAS.2014.6933973⟩. ⟨hal-01227625⟩