Patent application number | Description | Published |
20080237354 | Semiconductor integrated circuit device - There are provided an operational amplifier (A | 10-02-2008 |
20090109001 | Wireless IC tag, wireless IC tag system and operation method for wireless IC tag - A wireless IC tag system according to the present invention is provided with a wireless IC tag, a reader/writer device and a high-frequency signal output device. The reader/writer device outputs a first high-frequency signal. The high-frequency signal output device outputs a second high-frequency signal only during a period when the reader/writer device outputs the first high-frequency signal. The wireless IC tag is provided with an antenna, a power supply circuit and a communication circuit. The antenna receives the first and second high-frequency signals. The power supply circuit generates a power supply voltage from the first and second high-frequency signals. The communication circuit transmits and receives an information signal to and from the reader/writer device by utilizing the first high-frequency signal. | 04-30-2009 |
20090160652 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, AND NON-CONTACT TYPE IC CARD AND PORTABLE INFORMATION TERMINAL USING THE SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - The present invention provides a semiconductor integrated circuit device and a non-contact type IC card and a portable information terminal which uses the semiconductor integrated circuit device. The semiconductor integrated circuit device includes antenna terminals LA, LB which are connected to an antenna L | 06-25-2009 |
20090264163 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, AND NON-CONTACT TYPE IC CARD AND PROTABLE INFORMATION TERMINAL USING THE SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - The present invention provides a semiconductor integrated circuit device and a non-contact type IC card and a portable information terminal which uses the semiconductor integrated circuit device. The semiconductor integrated circuit device includes antenna terminals LA, LB which are connected to an antenna L | 10-22-2009 |
20090267736 | NON-CONTACT ELECTRONIC DEVICE - A contactless electronic device comprises a semiconductor integrated circuit device, a plurality of antennas (or antenna coils) for receiving high-frequency signals supplied by radio waves or electromagnetic waves having different frequencies. An interface judgment circuit judges which antenna the high-frequency signals are inputted through, and according to a result of the judgment, the operation of the semiconductor integrated circuit device is changed. In this manner, the contactless electronic device becomes possible to respond to a plurality of communication protocols using high-frequency signals having different frequencies, while contactless electronic devices have been impossible to respond to communication protocols using various high-frequency signals. | 10-29-2009 |
20100088534 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND IC CARD USING THE SAME - The present invention enables a power-supply voltage terminal and an internal circuit to be isolated from each other in a noncontact operation without largely increasing a chip area in a semiconductor integrated circuit device for an IC card. A semiconductor integrated circuit device comprises: a first power supply circuit for rectifying and smoothing an AC signal supplied from an antenna to an antenna terminal, thereby obtaining a DC voltage in a first power-supply line; a second power supply circuit comprising a voltage control circuit for controlling gate terminal voltage of a first MOS transistor disposed between a power supply terminal to which power is input from the outside and the first power supply line; a substrate potential control circuit for forming source voltage of the first MOS transistor as a substrate voltage; and a second MOS transistor which makes substrate voltage and gate voltage of the first MOS transistor conductive in the case of using the voltage generated by the first power supply circuit as a power supply, and which makes the substrate voltage and the gate voltage nonconductive in the case of using a power supply from an external terminal. | 04-08-2010 |
20100144402 | SEMICONDUCTOR INTEGRATED CIRCUIT, NONCONTACT/CONTACT ELECTRONICS DEVICE USING THE SAME AND MOBILE TERMINAL - The semiconductor integrated circuit includes: a pair of antenna terminals; a rectifier; a source-voltage terminal; a shunt regulator; a series regulator. When the voltage of the inside source line rises to or above a first set voltage, the shunt regulator passes a pull-down current through a pull-down transistor. When the voltage of the inside source line drops to or below the second set voltage, the series regulator passes a pull-up current through a pull-up transistor. The first set voltage is set to be higher than the second set voltage in voltage level. With the semiconductor integrated circuit, the competition of actions of the two regulators is prevented. The semiconductor integrated circuit is arranged to work in contact and noncontact operation modes, and a stable source voltage can be supplied to an internal circuit thereof. | 06-10-2010 |
20110132988 | NON-CONTACT ELECTRONIC DEVICE - A non-contact electronic device wherein variation in resonance frequency due to mutual interference between coils provided in individual IC cards can be suppressed and the housing thereof can be easily reduced in thickness is provided. The non-contact electronic device include: a substrate; a first coil for antenna arranged in the substrate; a semiconductor integrated circuit device that is arranged in the substrate and carries out non-contact interface between it and an external source utilizing the first coil; and a second coil comprising a resonance circuit together with the first coil and shielded from electromagnetic waves. Even when multiple non-contact electronic devices are simultaneously used, it is possible to suppress variation in resonance frequency due to mutual interference between the coils provided in individual non-contact electronic devices. Thus stable data communication can be achieved without significant degradation in communication distance regardless of the number of non-contact electronic devices. | 06-09-2011 |
20120006905 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND IC CARD MOUNTING SAME - In an IC card, even in the case where an undershoot or an overshoot which occurs at the time of an amplitude change by communication data is large, the amplitude change is accurately detected. | 01-12-2012 |
20120120699 | SEMICONDUCTOR INTEGRATED CIRCUIT, NONCONTACT/CONTACT ELECTRONICS DEVICE USING THE SAME AND MOBILE TERMINAL - The semiconductor integrated circuit includes: a pair of antenna terminals; a rectifier; a source-voltage terminal; a shunt regulator; a series regulator. When the voltage of the inside source line rises to or above a first set voltage, the shunt regulator passes a pull-down current through a pull-down transistor. When the voltage of the inside source line drops to or below the second set voltage, the series regulator passes a pull-up current through a pull-up transistor. The first set voltage is set to be higher than the second set voltage in voltage level. With the semiconductor integrated circuit, the competition of actions of the two regulators is prevented. The semiconductor integrated circuit is arranged to work in contact and noncontact operation modes, and a stable source voltage can be supplied to an internal circuit thereof. | 05-17-2012 |
20130067252 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND IC CARD USING THE SAME - A semiconductor intergrated circuit device which enables a power-supply voltage terminal and an internal circuit to be isolated from each other in a noncontact operation of a semiconductor integrated circuit device for an IC card, including a first power supply circuit for rectifying and smoothing an AC signal supplied from an antenna, a second power supply circuit which includes a voltage control circuit for controlling a gate terminal voltage of a first MOS transistor, a substrate potential control circuit for forming a source voltage of the first MOS transistor as a substrate voltage, and a second MOS transistor which causes the substrate voltage and the gate voltage of the first MOS transistor to be conductive when using the first power supply circuit, and which causes the substrate voltage and the gate voltage to be nonconductive when using power supplied from an external terminal. | 03-14-2013 |
Patent application number | Description | Published |
20120120989 | CONTACTLESS COMMUNICATION DEVICE, CONTACTLESS IC CARD, AND MOBILE INFORMATION TERMINAL - There is included a detection unit for detecting a magnitude of a surplus of a direct current to a source voltage generated by a voltage generation unit generating the source voltage from the direct current obtained by rectifying a signal inputted from an antenna terminal. A data processing unit operating at the source voltage and performing data processing on a transmission/reception signal includes a clock control unit for determining a frequency of a clock signal for the data processing based on the magnitude of the surplus current detected by the detection unit in a state where a frequency of the clock signal is set to a predetermined reference frequency. Since the power consumed by the data processing unit at the time of detecting the surplus of the direct current is determined by the specific reference frequency, the surplus of the direct current can be detected as an absolute surplus. | 05-17-2012 |
20130224578 | NONAQUEOUS ELECTROLYTE SOLUTION AND NONAQUEOUS ELECTROLYTE BATTERY USING SAME - The present invention relates to a nonaqueous electrolyte solution comprising a lithium salt and a nonaqueous organic solvent, wherein the nonaqueous electrolyte solution comprises a specific sulfonic acid ester. | 08-29-2013 |
20130278284 | SEMICONDUCTOR DEVICE AND CONTROL SYSTEM - To enhance the security of a semiconductor device, the semiconductor device has a regulator unit for generating an internal power supply voltage based on a power supply voltage supplied from outside, an internal circuit which operates on the internal power supply voltage, a current detection unit for monitoring a power supply current supplied to the internal circuit, and a control unit for controlling operation of the internal circuit. In the semiconductor device, when the current detection unit detects that the power supply current exceeds a predetermined threshold value, the control unit restricts the operation of the internal circuit. | 10-24-2013 |