Chopper circuitry operable in a high temperature environment of a turbine engine

US8717095B2 · kind B2 · utility

Assignee

• SIEMENS ENERGY, INC. · US

Inventors

• David J. Mitchell · Oviedo, US
• Jie Yang · Albany, US
• Roberto M. Schupbach · Fayetteville, US
• John R. Fraley · Fayetteville, US
• Cora Schillig · Orlando, US
• Bryon Western · West Fork, US

Key dates

• Filing date: Jul 9, 2012
• Grant date: May 6, 2014
• Expiry date: Aug 9, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2209/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Chopper circuitry may be adapted to operate in a high-temperature environment of a turbine. A first semiconductor switch (122) may have a first terminal coupled to receive a first output signal from a first leg (148) of a differential amplifier (150). A second switch (128) may have a first terminal coupled thru a first resistive element (R1) to a second terminal of the first semiconductor switch. The first terminal of the second semiconductor switch may be coupled to receive thru a second resistive element (R2) a second output signal from a second leg (152) of the amplifier. Switches (122,128) may be responsive to a switching control signal to respective gate terminals of the switches to supply an output signal, which alternates in correspondence with a frequency of the switching control signal from a first amplitude level to a second amplitude level, which effectively provides a doubling amplification factor.