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:
Mar. 22, 2016
Filed:
Dec. 18, 2013
National Instruments Corporation, Austin, TX (US);
Christopher G. Regier, Cedar Park, TX (US);
National Instruments Corporation, Austin, TX (US);
Abstract
A hybrid amplifier includes a linear amplifier coupled in series with a switching amplifier. The linear amplifier may generate an intermediate amplified signal according to an input signal. The switching amplifier may generate an output signal according to the intermediate amplified signal, the output signal having an amplitude with respect to a reference voltage provided at a reference node. The linear amplifier may drive the reference node to adjust the reference voltage responsive to transient changes in the output signal. A high-pass filter coupled to the linear amplifier and the switching amplifier may enable the switching amplifier to provide most of the steady-state current, which may drive a load, from actual ground. The linear amplifier and switching amplifier may be independently powered, for example from a power supply having a primary winding and two electrically isolated secondary windings that respectively provide power to the linear amplifier and the switching amplifier.