Amplitude modulation with wave shaping

摘要

A modulation circuit amplitude-modulates a carrier wave applied to base of a transistor according to signal wave applied to emitter of transistor. A signal generator inputs rectangular pulse signal (22) corresponding to digital data, and generates another signal wave such that level at rise time and fall time of rectangular pulse signal is higher and lower than the steady state signal. Independent claims are also included for the following: (1) modulation method; (2) information processing device; and (3) information processing method.