DC/DC converter, and power amplifier applying the same

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

Reexamination Certificate

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Reexamination Certificate

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07973522

ABSTRACT:
A DC/DC converter capable of controlling an output signal using a broadband signal input is provided. By employing the above DC/DC converter as a power supply, a highly efficient power amplifier can be configured. The above DC/DC converter includes two class-C amplifiers, a rectifier circuit connected between each output of the two class-C amplifiers, and an oscillator of a predetermined frequency signal. The predetermined frequency signal output from the oscillator is input to each of the two class-C amplifiers, and by controlling the phase difference of the predetermined frequency signal input to the two class-C amplifiers, the magnitude of a direct current voltage output from the rectifier circuit is made variable.

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Sahu B. et al. “A High-Efficiency Linear RF Power Amplifier with a Power-Tracking Dynamically Adaptive Buck-Boost Supply” IEEE Transactions on Microwave Theory and Techniques, IEEE Service Center, Piscataway, NJ. US, vol. 52, No. 1 Part 01 Jan. 1, 2004, pp. 112-120, XP001046321 ISSN: 0018-9480 *p. 114-p. 115*.
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Supplementary European Search Report dated Jan. 29, 2010 received in Application No. 05765371.9 2207/1916759 PCT/JP2005/012027.

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