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. 09, 2021
Filed:
Jul. 25, 2019
Applicant:
Nxp Usa, Inc., Austin, TX (US);
Inventors:
Mahraj Sivaraj, Austin, TX (US);
John Pigott, Phoenix, AZ (US);
Assignee:
NXP USA, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/46 (2006.01); G05F 1/575 (2006.01); G05F 3/20 (2006.01);
U.S. Cl.
CPC ...
G05F 1/461 (2013.01); G05F 1/575 (2013.01); G05F 3/205 (2013.01);
Abstract
A method for current limiting an operational amplifier includes sensing a first current through a first branch of the operational amplifier. The first branch conducts the first current from a limited current supply connected to an operational amplifier output. The first current is compared to a reference current to generate a regulation signal. A variable current source is controlled with the regulation signal. An output current of a transconductance amplifier is limited with the variable current source to limit the first current in response thereto.