Contactless apparatus and card-type device having clock rectifier that is independent of power rectifier and demodulator with RC time constant based on selectable resistor

摘要

An information processing apparatus receives a carrier wave modulated in accordance with information and extracts the information and power therefrom to execute a given process. A receiving circuit receives the carrier wave. A dc power generating circuit rectifies the carrier wave received by the receiving circuit to thereby generate dc power. A demodulation circuit is structurally independent of the dc power generating circuit, and retrieves the information modulated onto the carrier wave. An information processing circuit is supplied with the dc power as a power source, and processes the information retrieved by the demodulation circuit in a given manner. Since the demodulation circuit and the dc power generating circuit are structurally independent of each other, interference between elements included in these circuits can be eliminated and simple designing is enabled. In addition, power consumed in the apparatus can be reduced because of optimal designing.