SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND NON-CONTACT ELECTRONIC DEVICE

Japanese Patent JP2003319574

A

To control the voltage, generated in the antenna terminal of a non- contact IC card, prevented from exceeding the breakdown voltage of an element.

A first rectifier transistor connecting a gate and a drain through a first resistor means to make a rectified current flow between first/second input terminals, a first voltage control current source formed with a current responding to the control voltage, a first voltage detection means formed with the control voltage so as to make rectified voltage obtained in a source side of the first rectifier transistor agree with the prescribed reference voltage, and a first one-way directional element allowing a current corresponding to the rectified current to flow between the first input terminal and a first output terminal out-putting the rectified voltage, are provided, the resistance of the first resistor means is set so as to prevent the voltage generated between the first/second input terminals from exceeding the breakdown voltage of an element constituting the circuit.

JP3131344	INDUSTRIAL APPLICABILITY: A reduced voltage sensing cutoff circuit and a sequence circuit using the circuit
JP2002186175	PARALLEL OPERATION POWER SUPPLY FOR PHYSICAL SEPARATION OF FAULT
JP2012249350	ELECTRONIC APPARATUS

WATANABE KAZUKI
KUBOTA MASARU
MATSUSHITA KAZUHIRO
KINOTA HAJIME

JP2002123390A

November 07, 2003

April 25, 2002

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HITACHI LTD
HITACHI ULSI SYS CO LTD

H02H7/20; H02H9/04; H02J50/00; H02J50/10; H04B5/02; G06K19/07; (IPC1-7): H02J17/00; G06K19/07; H02H7/20; H02H9/04; H04B5/02

Sakuta Yasuo

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