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:
Sep. 01, 2009
Filed:
Nov. 09, 2007
Frank Destasi, San Leandro, CA (US);
Michael Eugene Broach, San Mateo, CA (US);
Frank DeStasi, San Leandro, CA (US);
Michael Eugene Broach, San Mateo, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A system and a method are disclosed for controlling an error amplifier between control mode changes. An error amplifier comprises a first stage that comprises a first current source and a second stage that comprises a second current source and at least one compensation component that is connected to the first stage through a signal line. A buffer circuit is connected between the signal line and the at least one compensation component and a switch circuit is connected between the buffer circuit and the at least one compensation component. When switched in to the error amplifier the buffer circuit provides a value of current to the at least one compensation component that is larger than a value of current that is provided to the at least one compensation component from the signal line. This increases the slew rate of the error amplifier during a pulse frequency modulation control mode.