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Hybrid switched mode/linear power amplifier power supply for use in polar transmitter

  • US 20050064830A1
  • Filed: 09/16/2004
  • Published: 03/24/2005
  • Est. Priority Date: 09/16/2003
  • Status: Active Grant
First Claim
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1. A DC-DC converter, comprising:

  • a switch mode part for coupling between a DC source and a load, the switch mode part providing x amount of output power; and

    a linear mode part coupled in parallel with the switch mode part between the same or a different DC source and the load, the linear mode part providing y amount of output power, where x is preferably greater than y, and the ratio of x to y may be optimized for particular application constraints, where the linear mode part exhibits a faster response time to a required change in output voltage than the switch mode part.

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