Patent ID: 7881399
Filing Date: 2011-02-01
Classification: H03C,H03D,H03F,H03M

Abstract:
1. A transmission circuit for generating and outputting a transmission signal based on input data, the transmission circuit comprising: a signal generation section for performing predetermined signal processing on the input data, thereby generating an amplitude signal and an angle-modulated signal; an amplitude calculation section for performing predetermined arithmetic processing on the amplitude signal, and outputting a resultant signal as a discrete value signal having a plurality of discrete values corresponding to a magnitude of the amplitude signal; a delta-sigma modulated signal generation section for delta-sigma modulating the amplitude signal in accordance with the discrete value signal, and outputting a resultant signal as a delta-sigma modulated signal; an amplitude amplifying section for outputting a signal corresponding to a magnitude of the delta-sigma modulated signal; and an amplitude modulation section for amplitude-modulating, by amplifying the angle-modulated signal in accordance with the signal outputted from the amplitude amplifying section, the angle-modulated signal, and outputting a resultant signal as a transmission signal having been angle-modulated and amplitude-modulated, wherein the amplitude calculation section