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

  • US 7,653,366 B2
  • Filed: 04/05/2006
  • Issued: 01/26/2010
  • 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 between a DC source and a load, the switch mode part is configured to provide x amount of output power; and

    a linear mode part in parallel with the switch mode part between the same or a different DC source and the load, the linear mode part configured to provide y amount of output power, where x is greater than y, and the ratio of x to y is 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, where the linear mode part compensates at least in part for load variations, wherein the switch mode part is configured to be switchable between a slave mode controlled by the linear mode part and a master mode.

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