The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Jul. 09, 2012
David J. Mitchell, Oviedo, FL (US);
Jie Yang, Fayetteville, AR (US);
Roberto Marcelo Schupbach, Fayetteville, AR (US);
John R. Fraley, Fayetteville, AR (US);
Cora Schillig, Orlando, FL (US);
Bryon Western, Fayetteville, AR (US);
David J. Mitchell, Oviedo, FL (US);
Jie Yang, Fayetteville, AR (US);
Roberto Marcelo Schupbach, Fayetteville, AR (US);
John R. Fraley, Fayetteville, AR (US);
Cora Schillig, Orlando, FL (US);
Bryon Western, Fayetteville, AR (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
Chopper circuitry may be adapted to operate in a high-temperature environment of a turbine. A first semiconductor switch () may have a first terminal coupled to receive a first output signal from a first leg () of a differential amplifier (). A second switch () may have a first terminal coupled thru a first resistive element (R) 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 (R) a second output signal from a second leg () of the amplifier. Switches () 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.