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11. 发明专利

JPH1173481A NONCONTACT TYPE IC CARD 失效
公开(公告)号：JPH1173481A
公开(公告)日：1999-03-16
申请号：JP23209397
申请日：1997-08-28
申请人： HITACHI LTD
发明人： TANIGAWA HIROYUKI , TAKEUCHI MIKI
IPC分类号： G11C14/00 , G06K17/00 , G06K19/07 , G11C5/14 , G11C11/22 , G11C16/06 , G11C16/24 , H02J17/00
摘要： PROBLEM TO BE SOLVED: To obtain a memory for a noncontact type IC card which has a long communication distance and low power consumption, and performs excellent low-voltage operation by providing a voltage generating circuit which generates a 1st positive source potential from the positive potential component of an AC signal and a negative source potential from the negative potential component of the AC signal. SOLUTION: The AC signal sent with an electromagnetic wave such as a microwave is received by an LC tuning circuit 110 and demodulated by a modulating and demodulating circuit 130. Further, the received signal is inputted to a voltage generating circuit 120 as AC electric power. The voltage generating circuit 120 rectifies the AC electric power to generates a positive potential V1 and a negative potential V2 at the same time and supplies them as driving electric power to the modulating and demodulating circuit 130, a nonvolatile memory 140, and a microprocessor 150. In this constitution, the voltage generating circuit 120 generates the two positive and negative potentials from the inputted AC signal, so the communication distance (distance between a card-side coil and the coil of a device which reads and writes the card) can be increased.

12. 发明专利

JPH10111896A IC CARD AND ITS PROCESSOR 失效
公开(公告)号：JPH10111896A
公开(公告)日：1998-04-28
申请号：JP26276096
申请日：1996-10-03
申请人： HITACHI LTD
发明人： TAKEUCHI MIKI , TANIGAWA HIROYUKI
IPC分类号： G07F19/00 , G06F15/00 , G06F19/00 , G06F21/31 , G06F21/34 , G06Q20/00 , G06Q20/06 , G06Q20/40 , G06Q20/42 , G06Q40/00 , G06Q40/02 , G06Q50/00 , G07F7/12 , G07G1/12 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To enable electronic commerce of high security by outputting a 2nd password or its processed signal when an input signal to an IC card matches with a 1st password. SOLUTION: A bank system refers to information regarding EM with an electronic money ID and sends unused passwords i.1 or its processed signal f(passowrd i.1) (f(x): arbitrary function) to the EM. When the sent password i.1 matches with a password i.1 stored in the EM, the EM outputs a password i.2 or its processed signal g(password i.2) and sends it to the bank system. This passowrd i.2 operates equally to a password code. The bank system compares and inspects the sent password i.1 with the internal information regarding the EM to determine that it is the EM with the electronic money ID.

13. 发明专利

JP2002319286A NONVOLATILE STORAGE DEVICE AND STORAGE SYSTEM 失效
公开(公告)号：JP2002319286A
公开(公告)日：2002-10-31
申请号：JP2001120794
申请日：2001-04-19
申请人： HITACHI LTD , HITACHI ULSI SYS CO LTD
发明人： TANAKA TOSHIHIRO , TANIGAWA HIROYUKI , NAKANO SHINKICHI , OMASHI NORIO , WATANABE YUKIMI , SHINAGAWA YUTAKA
IPC分类号： G11C16/02 , G11C16/34
摘要： PROBLEM TO BE SOLVED: To solve the conventional problem of write-in and erasure being unable to be converged easily in a verify-system, using a constant voltage. SOLUTION: In verify-operation for confirming whether or not threshold voltage of a memory cell is included in the prescribed threshold voltage distribution after write-on or erasure, it is evacuated that write-in and erasure operation will not converge and that write-in and erasure can be finished for a short time, by changing discriminating conditions for relaxing the direction with verify-voltage of three stages or more.

14. 发明专利

JPH11265324A PERSONAL INFORMATION TERMINAL 失效
公开(公告)号：JPH11265324A
公开(公告)日：1999-09-28
申请号：JP6800798
申请日：1998-03-18
申请人： HITACHI LTD
发明人： TAKEUCHI MIKI , YAMADA KOSHI , NISHIMOTO JUNICHI , SHIMAZAKI YASUHISA , TANIGAWA HIROYUKI , KOBAYASHI NOBUYOSHI
IPC分类号： G06F1/26 , G06F13/00
摘要： PROBLEM TO BE SOLVED: To provide a personal information terminal having low power consumption, high speed, high reliability and high operability. SOLUTION: Communication data to be stored in the personal information terminal belong to any one of plural previously determined items in accodance with its contents and allowed to flow like radio broadcasting. At the time of detecting the incoming of data, power is supplied to an amplifier and a control circuit (step 402). When the item ID and version ID of received radio communication data exist, the version ID is stored and the data are destructed when the item ID of newly received communication data does not coincide with item ID received and specified by a user (step 404 : N) and the version ID of the data coincides with version ID specified by the user (step 407: N). The communication data are entered in a non-volatile memory (ferroelectric memory) or destructed based on user specification.

15. 发明专利

JPH1078836A DATA PROCESSOR 失效
公开(公告)号：JPH1078836A
公开(公告)日：1998-03-24
申请号：JP23486096
申请日：1996-09-05
申请人： HITACHI LTD
发明人： NISHIMOTO JUNICHI , YAMADA KOSHI , TAKEUCHI MIKI , TANIGAWA HIROYUKI , SHIMAZAKI YASUHISA , KOBAYASHI NOBUYOSHI
IPC分类号： G06F1/26 , G06F1/30 , G06F1/32 , G06F11/22
摘要： PROBLEM TO BE SOLVED: To reduce the power consumption by reducing the leakage current during standby of a data processor. SOLUTION: Plural sequential circuits in a CPU + core 114 are constituted of plural scannable flip flops and plural combined circuits. The data of those flip flops are successively scanned-out and saved to a ferroelectric memory 110 by the control of a control circuit 103 before transition from a normal state to a waiting state. Data held in memories in a cache 122 or an RAM 127 are also successively read and saved by the control of the control circuit 103, and a power source switching circuit 146 is controlled so that power supply to those inside modules can be interrupted. The power source switching circuit 146 is controlled so that the power supply to those inside modules can be resumed before transition form the standby state to the normal state. Those saved data are successively read out of the ferroelectric memory 110, and written in the inside module which holds each data.

16. 发明专利

JPH09134594A SEMICONDUCTOR NONVOLATILE MEMORY 失效
公开(公告)号：JPH09134594A
公开(公告)日：1997-05-20
申请号：JP28959695
申请日：1995-11-08
申请人： HITACHI LTD
发明人： TANIGAWA HIROYUKI , TAKEUCHI MIKI
IPC分类号： G11C14/00 , G11C11/22
摘要： PROBLEM TO BE SOLVED: To obtain a highly reliable, highly integrated nonvolatile ferroelectric memory exerting a long life to a fatigue of a ferroelectric capacitor, by constituting the memory of a memory cell for storing information and a dummy cell for judging stored information. SOLUTION: The drawing shows a constitution of a cell of a ferroelectric memory. A pair of data lines DLMm and BLMm wherein (m) is the order of an array are coupled to one sense amplifier per unit array. To each data line are connected (n) memory cells consisting of a ferroelectric capacitor CFE and a field effect transistor, and a dummy cell of a combination of a cell of the same shape as the memory cell and a cell of a paraelectric capacitor CO and a field effect transistor. The ferroelectric capacitor of the dummy cell is polarized in a direction not to cause a polarization inversion during the operation. A capacity of the paraelectric capacitor CO is determined to be lower than an intermediate value of potentials of two signals output to the data line corresponding to binary information stored in the memory cell.

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