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, 2020
Filed:
Aug. 27, 2019
Analog Devices International Unlimited Company, Limerick, IE;
Venkata Aruna Srikanth Nittala, Bengaluru, IN;
Abhilasha Kawle, Bangalore, IN;
Rajasekar Rajendran, Bangalore, IN;
Analog Devices International Unlimited Company, Limerick, IE;
Abstract
A voltage reference noise filter is provided that substantially eliminates noise with minimal external components for any circuit where the reference load current is a constant load and the circuit uses external components that have values that may vary with temperature, over time, and the like. The drift on an output of a voltage reference due to variation of resistor of the external filter is mitigated by moving the external resistor onto the chip containing the circuit. The voltage drop across the resistor is digitally compensated by a scaling factor determined during calibration. When more than one converter is provided on the chip, a further adjustment to the outputs of the converters is made based on the number of converters powered on or off. Also, error in output of converters due to mismatch among the converters is digitally compensated by a further scaling factor.