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. 30, 2003
Filed:
Feb. 14, 2003
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An exemplary trimming circuit can be further simplified to include a single current source to provide for trimming of offset and temperature drift in a device, such as an op amp, voltage reference and the like. A single temperature-dependent current source is trimmed to a predetermined value, for example to zero, at a first temperature, and then the current from the temperature-dependent current source is used to trim output parameters, i.e., adjust the output variables, to a desired value at a second temperature. An exemplary trimming circuit comprises a temperature-dependent current source I , a current switch and a device to be, trimmed. The current switch is configured to suitably facilitate the trimming of the trimmed device through coupling of a fraction or multiple of the current signal from temperature-dependent current source I to one or more offset-control terminals of the trimmed device.