AMPLIFICATORE INTEGRATO PER STRUMENTAZIONE CON INGRESSO DIFFERENZIALE ED UNA SINGOLA SORGENTE DI ALIMENTAZIONE, CON CAPACITA' INTEGRATE DI STABILIZZAZIONE IN FREQUENZA.

摘要

The amplifier (A) includes first and second input transistors (Q1, Q2) which are connected to respective first and second feedback amplification circuits (A1, A2) associated with respective frequency-compensating capacitances (C2, C1). The second feedback amplification circuit (A2) has a two-stage structure and includes an internal compensating capacitance (CX). The three frequency-compensating capacitances can have low values and can thus conveniently be integrated in the same chip as the amplifier (A). The amplifier can be used, in particular, as an interface between a zirconium-dioxide oxygen sensor and an electronic control unit which have different earth conductors (GND1, GND0).