| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmitter for attaining the reduction of a circuit mounting area and also simultaneously transmitting RF signals of a plurality of bands, and also to provide a program.SOLUTION: The transmitter includes: a plurality of delta-sigma converters for performing delta-sigma conversion, concerning the respective I signals and Q signals of base band signals to be transmitted by each band, so as to allow a noise component in the base band signal of one band to be attenuated in the frequency band of a desired signal in the base band signal of the other band; a plurality of mixers for converting the frequencies of the respective I signals and Q signals output from the delta-sigma converter by each band into carrier frequencies; an adder for adding the carrier frequency signals of the I signals to the carrier frequency signals of the Q signals by each band; a power amplifier for inputting a plurality of addition signals and adding the output currents by a switch type amplifier; and a multi band-pass filter for passing only the frequency band of the desired signal in the plurality of bands, and performing an output to a multi-band antenna. |
