Transmitter

Details Transmitter Transmitter

2006-10-03

2006-10-03

Moe, Aung (Department: 2618)

Telecommunications

Transmitter

C455S127100

Reexamination Certificate

active

07116947

ABSTRACT:
An amplitude component and a phase component of a modulated signal are inputted into a power supply terminal and an input terminal of an RF power amplifier, respectively, and a modulated wave that is produced by demodulating an original modulated signal is obtained from the RF power amplifier. A supply voltage is supplied to an emitter follower and an operational amplifier via a switch group from a DC-DC converter group whose output voltages are sequentially different. As the supply voltage, any pair of outputs of DC-DC converters by the switch group is selected according to levels of the amplitude component, and provides them to the emitter follower and the operational amplifier. The emitter follower performs a DC conversion of the provided supply voltage to provide it to the RF power amplifier.

REFERENCES:
patent: 6256482 (2001-07-01), Raab
patent: 2004/0185803 (2004-09-01), Tanabe et al.
patent: 2005/0118965 (2005-06-01), Tanabe et al.
patent: 2005/0136854 (2005-06-01), Akizuki et al.
patent: 2005/0202789 (2005-09-01), Tanabe et al.
patent: 2006/0068697 (2006-03-01), Tanabe et al.

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