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:
Dec. 30, 2014
Filed:
Feb. 25, 2011
Kalin V. Lazarov, Colorado Springs, CO (US);
Matthew J. Maloney, Colorado Springs, CO (US);
Christopher Pollard, Colorado Springs, CO (US);
Edson W. Porter, Colorado Springs, CO (US);
Kalin V. Lazarov, Colorado Springs, CO (US);
Matthew J. Maloney, Colorado Springs, CO (US);
Christopher Pollard, Colorado Springs, CO (US);
Edson W. Porter, Colorado Springs, CO (US);
Linear Technology Corporation, Milpitas, CA (US);
Abstract
In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense element and a temperature signal from the temperature sensor are received by processing circuitry. The processing circuitry determines a power dissipated by the sense element, which may be instantaneous or average power, and determines an increased temperature of the sense element. The resistance of the sense element is changed by the increased temperature, and this derived resistance Rs is used to calculate the current through the sense element using the equation I=V/R or other related equation. The process is iterative to continuously improve accuracy and update the current.