Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2002-03-04
2009-06-30
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S544000, C327S407000, C307S043000, C307S080000, C307S081000
Reexamination Certificate
active
07554383
ABSTRACT:
The present invention relates to a semiconductor integrated-circuit device capable of seamlessly switching a power source obtained by rectifying a carrier wave and an external power source. The semiconductor integrated-circuit device having a non-contact card function and a non-contact reader/writer function includes a rectifier131for rectifying a received carrier wave, a serial regulator132for obtaining a predetermined voltage from an output voltage of the rectifier131,and a power-supply control circuit138for turning on/off the voltage from a battery160.In a case where the output voltage of the battery160is equal to or higher than a predetermined voltage, the power-supply control circuit138selects the voltage of the battery160as power required for operation of an IC300when a reader/writer mode signal or a card mode signal is received. On the other hand, when the output voltage of the battery160is lower than the predetermined voltage, the power-supply control circuit138selects the output voltage from the rectifier131as power required for operation of the IC300.The present invention can be applied to a portable terminal, such as a cellular phone.
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Arisawa Shigeru
Yamagata Akihiko
Lerner David Littenberg Krumholz & Mentlik LLP
Nguyen Long
Sony Corporation
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