SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, NONCONTACT ELECTRONIC EQUIPMENT, AND PORTABLE INFORMATION TERMINAL

摘要

PROBLEM TO BE SOLVED: To lessen parasitic capacity added between antenna terminals, in a semiconductor integrated circuit device where a rectifying device constituting a rectifying circuit is constituted of a MOS transistor whose gate terminal is connected to one antenna joining terminal and whose source terminal is connected to the other antenna joining terminal.

SOLUTION: A first MOS transistor M3 whose gate terminal is connected to a second input terminal is connected between a first input terminal and a first output terminal. The bulk terminal of the first MOS transistor M3 is controlled by the output terminal of a first bulk terminal control circuit connected between the first input terminal and the second input terminal. Likewise, the bulk terminal of a second MOS transistor M5 connected between the second input terminal and the first output terminal is controlled by the output terminal of a second bulk terminal control circuit connected between the first input terminal and the second input terminal.

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