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    Test circuit for testing synchronous memory circuit
    1.
    发明专利
    Test circuit for testing synchronous memory circuit 有权
    用于测试同步存储器电路的测试电路

    公开(公告)号：JP2003007086A

    公开(公告)日：2003-01-10

    申请号：JP2002098649

    申请日：2002-04-01

    Applicant: Infineon Technologies Ag ,  インフィネオン テヒノロギーズ アーゲー

    Inventor： ERNST WOLFGANG ,  KRAUSE GUNNAR ,  KUHN JUSTUS ,  LUPKE JENS ,  POECHMUELLER PETER ,  MUELLER JOCHEN ,  SCHITTENHELM MICHAEL

    IPC: G01R31/28 ,  G11C29/48 ,  G11C29/56 ,  G11C29/00

    CPC classification number: G11C29/48

    Abstract: PROBLEM TO BE SOLVED: To provide a test circuit for testing a synchronous memory circuit 3 which is operated with a high clock frequency and which is capable of adjusting test latency.
    SOLUTION: This test circuit has a frequency multiplying circuit 4 generating a high frequency clock signal for the synchronous memory chip 3 by multiplying a specific multiplication factor to the frequency of a low frequency clock from the external test unit 2, a test data generator 16 which generates test data based on a data control signal from the external test unit 2 and writes the data in the synchronous memory circuit 3, a first signal delay circuit 19 for delaying the test data by an adjustable first delay time, a second signal delay circuit 24 for delaying data from the circuit 3 to a test circuit 1 by an adjustable second delay time and a data comparing circuit 27 which compares the test data generated by the generator 16 with data from the circuit 3 and outputs a signal indicating whether the circuit 3 can operate or not to the unit 2.
    COPYRIGHT: (C)2003,JPO

    Abstract translation: 要解决的问题：提供一种用于测试以高时钟频率操作并且能够调整测试等待时间的同步存储器电路3的测试电路。 解决方案：该测试电路具有通过将特定乘法因子与来自外部测试单元2的低频时钟频率相乘的同步存储器芯片3产生高频时钟信号的倍频电路4，测试数据产生器16 基于来自外部测试单元2的数据控制信号生成测试数据，并将数据写入同步存储器电路3，第一信号延迟电路19，用于将测试数据延迟可调节的第一延迟时间;第二信号延迟电路24 用于通过可调节的第二延迟时间将电路3到测试电路1的数据延迟到数据比较电路27，数据比较电路27将由发生器16产生的测试数据与来自电路3的数据进行比较，并输出指示电路3是否可以 操作或不操作本机2。

    5.
    发明专利
    未知

    公开(公告)号：DE10034854A1

    公开(公告)日：2002-02-14

    申请号：DE10034854

    申请日：2000-07-18

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： LUEPKE JENS ,  ERNST WOLFGANG ,  KUHN JUSTUS ,  MUELLER JOCHEN ,  SCHITTENHELM MICHAEL ,  POECHMUELLER PETER ,  KRAUSE GUNNAR

    IPC: G01R31/3183 ,  G11C29/10 ,  G11C29/00

    Abstract: The method and the device generate digital signal patterns. Signal patterns or signal pattern groups are stored in a very small buffer register. The position of a following signal pattern or following signal pattern group is also stored in the form of a branch address, together with each signal pattern or each signal pattern group. A simple control logic circuit receives a control signal and determines whether the content of the currently addressed group is output continuously or the following group given by the branch address stored in the register is output after the currently selected group has been completely output. The novel method and device can advantageously be used for testing semiconductor memories and implemented in a cost-effective semiconductor circuit which is remote from a conventional test system.

    6.
    发明专利
    未知

    公开(公告)号：DE10034852A1

    公开(公告)日：2002-02-07

    申请号：DE10034852

    申请日：2000-07-18

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： ERNST WOLFGANG ,  KRAUSE GUNNAR ,  KUHN JUSTUS ,  LUEPKE JENS ,  MUELLER JOCHEN ,  POECHMUELLER PETER ,  SCHITTENHELM MICHAEL

    IPC: G11C29/50 ,  G11C29/56 ,  G11C29/00

    Abstract: A method and a device for reading and for checking the time position of a data response read out from a memory module to be tested, in particular a DRAM memory operating in DDR operation. In a test receiver, the data response from the memory module to be tested is latched into a data latch with a data strobe response signal that has been delayed. A symmetrical clock signal is generated as a calibration signal. The calibration signal is used to calibrate the time position of the delayed data strobe response signal with respect to the data response. The delayed data strobe response signal is used for latching the data response. The delay time is programmed into a delay device during the calibration operation and also supplies a measure for testing precise time relationships between the data strobe response signal (DQS) and the data response.

    7.
    发明专利
    未知

    公开(公告)号：DE10111440C2

    公开(公告)日：2003-02-20

    申请号：DE10111440

    申请日：2001-03-09

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： POECHMUELLER PETER ,  ERNST WOLFGANG ,  KRAUSE GUNNAR ,  KUHN JUSTUS ,  LUEPKE JENS ,  MUELLER JOCHEN ,  SCHITTENHELM MICHAEL

    IPC: G11C29/20 ,  G11C29/00

    Abstract: An address generator is provided for generating addresses for testing an addressable circuit. The address generator can include a base address register for buffer-storing a base address. The base address register can be assigned an associated offset register group having a plurality of offset registers for buffer-storing relative address values. Further, the address generator can include a first multiplexer circuit which is dependent on a base register selection control signal, switches through an address buffer-stored in the base address register to a first input of an addition circuit and to an address bus, which is connected to the circuit to be tested. A second multiplexer circuit can be dependent on the base register selection control signal, through-connects the offset register group associated with the through-connected base address register to a third multiplexer circuit, which is dependent on an offset register selection control signal.

    8.
    发明专利
    未知

    公开(公告)号：DE10122619C1

    公开(公告)日：2003-02-13

    申请号：DE10122619

    申请日：2001-05-10

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： ERNST WOLFGANG ,  KRAUSE GUNNAR ,  KUHN JUSTUS ,  LUEPKE JENS ,  MUELLER JOCHEN ,  POECHMUELLER PETER ,  SCHITTENHELM MICHAEL

    IPC: G01R31/319 ,  G01R31/3193 ,  G01R31/3183 ,  G11C29/00

    Abstract: Test circuit for testing a synchronous circuit (3) which is clocked with an operating clock signal with a high operating clock frequency, having: (a) a frequency multiplication circuit (8), which receives a clock signal from an external test unit (2) and multiplies the low clock frequency of said clock signal by a specific factor for the purpose of generating the operating clock signal; (b) a data comparison circuit (49), which is clocked with the operating clock signal, receives a data block read from the synchronous circuit (3) to be tested, which data block has a specific number (n) of data words n each comprising m data bits, and compares it with associated desired data words, each comprising m desired data, for the purpose of generating a corresponding number (n) of error data words each comprising m error data; (c) a data register array (56), which has a plurality of data registers for buffer-storing the error data words generated; (d) a first error compression circuit (58), which logically ORs the error data words buffer-stored in the data register array (56) to form a compressed error data word comprising m error bit [sic], which is buffer-stored in an error register; (e) and having a second error compression circuit (60), which logically ORs the m error data contained in the compressed error data word to form an indication datum, the indication datum being output to the external test unit (2) with the low clock frequency, and indicating whether at least one data error has occurred in the data block read from the synchronous circuit (3) to be tested.

    10.
    发明专利
    未知

    公开(公告)号：DE50112029D1

    公开(公告)日：2007-03-29

    申请号：DE50112029

    申请日：2001-06-28

    Applicant: INFINEON TECHNOLOGIES AG

    Inventor： ERNST WOLFGANG ,  KRAUSE GUNNAR ,  KUHN JUSTUS ,  LUEPKE JENS ,  MUELLER JOCHEN ,  POECHMUELLER PETER ,  SCHITTENHELM MICHAEL

    IPC: G11C29/00 ,  G01R31/3183 ,  G11C29/10

    Abstract: The method and the device generate digital signal patterns. Signal patterns or signal pattern groups are stored in a very small buffer register. The position of a following signal pattern or following signal pattern group is also stored in the form of a branch address, together with each signal pattern or each signal pattern group. A simple control logic circuit receives a control signal and determines whether the content of the currently addressed group is output continuously or the following group given by the branch address stored in the register is output after the currently selected group has been completely output. The novel method and device can advantageously be used for testing semiconductor memories and implemented in a cost-effective semiconductor circuit which is remote from a conventional test system.

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