Considerações sobre circuitos mistos reconfiguráveis para medição.

Abstract

Application specific reconfigurable circuits can be tuned after fabrication for adjustment to a particular application, among a defined classes of applications. These circuits are more generic but they can lose performance when compared to other circuits designed to be used for a single application. In this work, considerations about reconfigurable mixed-signal circuits for measurement applications are presented. These circuits allows their configuration to be adjusted for a measurement application, among a defined class of applications which may use sensors with different output signals characteristics and in several measurement modes of operation. An analysis of the effects on the final measurement quality, as the main performance parameter, when using those circuits is presented. Procedures defining how the configuration can be carried out for the circuit's functional blocs in order to attain the final desired measurement specifications, as resolution, time constants and range of measurement, are also discussed. In order to validate the developed theoretical study and to put in practice one of the proposed techniques, an integrated circuit was designed and fabricated.