Patent Number: 8,792,546

Title: Transmission circuit

Abstract: A transmission circuit comprises a .SIGMA.-.DELTA. modulator to perform .SIGMA.-.DELTA. modulation of an amplitude modulation component of a modulation signal and to output a pulse width modulation signal, an angle modulator to generate an angle modulation component signal of a signal obtained by multiplying the modulation signal by a transmission output control coefficient corresponding to a transmission output in a power amplifier, and a multiplier to multiply the pulse width modulation signal by the angle modulation component signal and to output a result of the multiplication as an output signal to the power amplifier.

Inventors: Nagatani; Kazuo (Kawasaki, JP), Fukuda; Eisuke (Kawasaki, JP), Yamao; Yasushi (Tokyo, JP)

Assignee: Fujitsu Limited

International Classification: H04L 27/36 (20060101)

Expiration Date: 7/29/12018