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. 20, 2018
Filed:
May. 21, 2015
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
There is provided a controller for controlling an output current of a switched mode power supply, SMPS. The controller comprises a sampling module arranged to sample a signal indicative of the output current of the SMPS at a frequency higher than a switching frequency of the SMPS, and a filter module arranged to filter out a ripple component of the sampled signal. The filter module comprises: a ripple component estimation module arranged to estimate the ripple component; a moving average calculation module arranged to calculate a moving average of the sampled signal; and a subtraction module arranged to generate a filtered signal by subtracting the estimated ripple component from the sampled signal and the calculated moving average. The controller also has a switching control module arranged to generate a control signal for controlling at least one of the switching frequency and a switching duty cycle of the SMPS based on the filtered signal.