Patent ID: 7116946
Filing Date: 2006-10-03
Classification: H03F,H04B

Abstract:
1. A transmitter comprising: modulated signal generating means for generating a modulated signal, phase/amplitude separating means for separating said modulated signal generated by said modulated signal generating means into a phase component and an amplitude component, amplitude slicing means for slicing said amplitude component separated by said phase/amplitude separating means at a plurality of voltage levels being different stepwise, a plurality of switching regulators for converting the power supply voltage into a plurality of voltages having different values stepwise, a switch group for selecting one of the output voltages of said plurality of switching regulators, a switch driver for selectively conducting each switch of said switch group according to the slice data of the amplitude component sliced by said amplitude slicing means, linear voltage converting means for voltage-converting said amplitude component by using the output voltage of one of the switching regulators selected by said switch group as the power supply voltage, and a high-frequency power amplifier for receiving said phase component at the high-frequency input terminal thereof, for receiving the amplitude component voltage-converted by said linear voltage converting means at the power supply terminal thereof and for, as a result, outputting a modulated wave in which amplitude and phase are multiplied.