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:
Oct. 02, 2018
Filed:
May. 20, 2016
Bolecano Holding Ab, Ramlösa, SE;
Patrik Boström, Ramlösa, SE;
BOLECANO HOLDING AB, Ramlösa, SE;
Abstract
A power amplifier includes an input amplifier, a comparator, a switching circuit, an output filter and a feedback filter. The input amplifier receives an input signal of the power amplifier at a positive input of the input amplifier and an output signal of the feedback filter at a negative input of the input amplifier. The input amplifier has a capacitive feedback from an output of the input amplifier to the negative input of the input amplifier. The comparator receives the output signal of the input amplifier at a positive input of the comparator and the output signal of the feedback filter at a negative input of the comparator. The comparator provides a control signal based on a comparison between signal levels of the signals at the positive and the negative inputs of the comparator. The switching circuit includes power switches and receives the control signal and controls the power switches that connect an output of the switching circuit to either a positive supply voltage or a negative supply voltage based on the control signal. The output filter receives an output signal provided at the output of the switching circuit and provides a filtered signal thereof to an output of the power amplifier. The feedback filter receives the output of the power amplifier and provides a filtered feedback signal to the negative input of the comparator and towards the negative input of the input amplifier.