Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2006-06-06
2006-06-06
Nguyen, Duc M. (Department: 2685)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S127200, C455S108000, C455S110000, C330S010000, C330S297000, C323S266000, C323S351000
Reexamination Certificate
active
07058373
ABSTRACT:
In one aspect this invention provides a DC-DC converter that has a switch mode part for coupling between a DC source and a load, the switch mode part providing x amount of output power; and that further has a linear mode part coupled in parallel with the switch mode part between the 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. In a further aspect there is a radio frequency (RF) transmitter (TX) for coupling to an antenna, where the TX has a polar architecture having an amplitude modulation (AM) path coupled to a power supply of a power amplifier (PA) and a phase modulation (PM) path coupled to an input of the PA, where the power supply includes the switch mode part for coupling between a battery and the PA and the linear mode part coupled in parallel with the switch mode part between the battery and the PA.
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Harrington & Smith ,LLP
Nguyen Duc M.
Nokia Corporation
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