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Power stage with switched mode amplifier and linear amplifier

  • US 9,831,839 B2
  • Filed: 03/07/2017
  • Issued: 11/28/2017
  • Est. Priority Date: 10/29/2014
  • Status: Active Grant
First Claim
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1. A power stage for producing an output voltage to a load, comprising:

  • a power converter comprising;

    a plurality of switches arranged to sequentially operate in a plurality of switch configurations; and

    an output for producing the output voltage comprising a first output terminal and a second output terminal, wherein a first switch of the plurality of switches is coupled to the first output terminal and a second switch of the plurality of switches is coupled to the second output terminal;

    a linear amplifier coupled to the output; and

    a controller configured to;

    in a first mode of operation of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load and disable the plurality of switches from transferring electrical energy from the input source to the load; and

    in a second mode of operation of the power stage, sequentially enable the linear amplifier in accordance with a probability which is a function of the output voltage to transfer electrical energy from the input source of the power stage to the load and sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.

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