Electronic circuitry for high-temperature environments

摘要

A circuitry adapted to operate in a high-temperature environment of a turbine engine is provided. A relatively high-gain differential amplifier (102) may have an input terminal coupled to receive a voltage indicative of a sensed parameter of a component (20) of the turbine engine. A hybrid load circuitry may be coupled to the differential amplifier. A voltage regulator circuitry (244) may be coupled to power the differential amplifier. The differential amplifier, the hybrid load circuitry and the voltage regulator circuitry may each be disposed in the high-temperature environment of the turbine engine.

主权项

1. A circuitry adapted to operate in a high-temperature environment of a turbine engine, the circuitry comprising:
a sensing element disposed on a component of the turbine engine to sense a parameter of the component and provide a voltage indicative of the sensed parameter; a differential amplifier having an input terminal coupled to the sensing element to receive the voltage indicative of the sensed parameter; wherein said differential amplifier comprises a first pair of semiconductor switches each having a respective gate bias network comprising a first resistive element having a positive temperature coefficient of resistance coupled between a voltage source and a respective gate terminal of a respective one of the semiconductor switches and a second resistive element having a zero temperature coefficient of resistance coupled between the respective gate terminal and electrical ground, wherein each respective gate bias network is arranged so that when temperature increases, a respective bias voltage at the respective gate terminals of the semiconductor switches decreases; and a hybrid load circuitry AC-coupled to the differential amplifier, wherein the differential amplifier and the hybrid load circuitry are disposed in the high-temperature environment of the turbine engine.