Patent ID: 8717095

Claim:
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 differential indicative of the sensed parameter; a differential amplifier having a first input terminal and a second input terminal respectively coupled to the sensing element to receive the voltage differential indicative of the sensed parameter; and a chopper circuitry coupled to the differential amplifier and comprising: a first semiconductor switch having a first terminal coupled to receive a first output signal from a first leg of the differential amplifier; and a second semiconductor switch having a first terminal coupled by way of a first resistive element to a second terminal of the first semiconductor switch, the first terminal of the second semiconductor switch coupled to receive by way of a second resistive element a second output signal from a second leg of said differential amplifier, wherein the first and the second semiconductor switches are responsive to a switching control signal, the switching control signal being applied in parallel circuit to respective gate terminals of the first and the second semiconductor switches, wherein the second terminal of the first switch supplies an output signal comprising an alternating current (AC) signal, which alternates in correspondence with a frequency of the switching control signal from a first amplitude level corresponding to a level of the first output signal of said differential amplifier to a second amplitude level corresponding to a level of the second output signal of said differential amplifier, wherein a second terminal of the second semiconductor switch is electrically grounded.