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:
Nov. 22, 2016
Filed:
Dec. 14, 2015
Semiconductor Components Industries, Llc, Phoenix, AZ (US);
Razvan Puscasu, Targoviste, RO;
Cornel D. Stanescu, Bucharest, RO;
Laurentiu O. Creosteanu, Voluntari, RO;
Pavel Brinzoi, Bucharest, RO;
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US);
Abstract
A method for adjusting common mode rejection ratio (CMRR) and gain error of a current sense (CS) amplifier, comprising: measuring a first referred to input (RTI) offset voltage while presenting a given common mode (CM) input voltage; adding a first trim resistor of a plurality of selectable trim resistors within an adjustable feedback resistor chain to a feedback electrical path; measuring a second RTI offset voltage while presenting the given CM input voltage; estimating, based upon the first and second RTI offset voltages, a third RTI offset voltage value that would result by adding a second trim resistor of the plurality of selectable trim resistors to the feedback electrical path; using the first, second and third RTI offset voltage values to identify the combination of selectable trim resistors that achieves an RTI offset voltage closest to zero volts; and adding the identified selectable trim resistors to the feedback electrical path.