US Patent 7388359 Constant current output using transconductance amplifier

Patent 7388359 was granted and assigned to National Semiconductor on June, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

National Semiconductor

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73883590

Patent Inventor Names

Lawrence Hok-Sun Ling0

Date of Patent

June 17, 2008

Patent Application Number

113573530

Date Filed

February 17, 2006

Patent Primary Examiner

‌

Gary L Laxton

Patent abstract

An apparatus in an electronic device such as a buck converter circuit receives as a first input a voltage signal VSNS from the electronic device that represents a current through the electronic device, and receives as a second input a direct current reference voltage signal from a reference voltage source VREF. The apparatus regulates a direct current output IOUT of the electronic device with respect to the reference voltage source VREF by applying a pulse level transformation to the voltage signal VSNS using an operational transconductance amplifier.