Signal conditioning for differential temperature measurement with thermistors using a generalized impedance converter.
In this article a differential temperature-to-time converter is presented using two thermistors in a generalized impedance converter, polarized in direct current. The voltage drop in one of the thermistors depends on the differential temperature at which both thermistors are exposed. Such voltage drop is compared to a signal which changes exponentially by obtaining a time interval which depends on the differential temperature. The results of the experimental tests support the theoretical analysis performed and at the same time offer a new possibility of application of the generalized impedance converter as a signal conditioning circuit.
Castro Montero
Enrique
E
Electrical Engineering Faculty, University of Oriente, Santiago de Cuba, Cuba.
Ramírez Muñoz
Diego
D
Sánchez Moreno
Jaime
J
Fong Barrio
Julio
J
Salazar Mustelier
Arquimides
A
D000669:Amplifiers, Electronic; D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013817:Thermography / Q000295:instrumentation* / Q000379:methods; D014159:Transducers