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:
Apr. 28, 2009
Filed:
May. 09, 2005
Paul Michael Henry, Tucson, AZ (US);
Paul Michael Henry, Tucson, AZ (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A system and method is disclosed for providing an offset voltage minimization circuit for an amplifier circuit. The present invention comprises a flip flop zero amplifier circuit that is capable of operating in a first configuration during a first period of time to obtain a first value of offset voltage. The flip flop zero amplifier circuit is also capable of operating in a second configuration during a second period of time to obtain a second value of offset voltage that has a polarity that is opposite to that of the first value of offset voltage. The two values of offset voltage are then averaged to obtain an average value of offset voltage that is approximately zero volts. The invention may be advantageously employed in a switching power supply circuit.