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    • 7. 发明授权
    • Semiconductor device, method of testing the semiconductor device, and semiconductor integrated circuit
    • 半导体器件,半导体器件的测试方法以及半导体集成电路
    • US06774655B2
    • 2004-08-10
    • US10622472
    • 2003-07-21
    • Yasurou MatsuzakiMasao NakanoToshiya UchidaAtsushi HatakeyamaKenichi KawasakiYasuhiro Fujii
    • Yasurou MatsuzakiMasao NakanoToshiya UchidaAtsushi HatakeyamaKenichi KawasakiYasuhiro Fujii
    • G01R3102
    • G11C29/022G11C29/02
    • A semiconductor device mounted on a board or the like and having a test circuit, having the function of carrying out a contact test at a low cost on the terminals of the semiconductor, is disclosed. The semiconductor device comprises a terminal test circuit for testing a state of a contact of an external terminal and a test mode control circuit unit. The test mode control circuit unit outputs a signal indicating a first operation mode upon application of a power supply voltage thereto, outputs a test mode signal to the terminal test circuit in response to a control signal input to a specific terminal such as a chip select terminal, and outputs a signal indicating a second operation mode in response to the number of times in which the level of the control signal input to the specific terminal changes. Preferably, the first operation mode is a terminal test mode, and the second operation mode is a normal operation mode. A method of testing the semiconductor device and a semiconductor integrated circuit, having the test circuit, are also disclosed.
    • 公开了一种安装在板等上并具有测试电路的半导体器件,具有在半导体端子上以低成本进行接触测试的功能。 半导体器件包括用于测试外部端子和测试模式控制电路单元的接触状态的端子测试电路。 测试模式控制电路单元在施加电源电压时输出指示第一操作模式的信号,响应于输入到诸如芯片选择端子的特定终端的控制信号,向终端测试电路输出测试模式信号 并且响应于输入到特定终端的控制信号的电平改变的次数而输出指示第二操作模式的信号。 优选地,第一操作模式是终端测试模式,并且第二操作模式是正常操作模式。 还公开了一种测试半导体器件的方法和具有测试电路的半导体集成电路。
    • 8. 发明授权
    • Semiconductor device, method of testing the semiconductor device, and semiconductor integrated circuit
    • 半导体器件,半导体器件的测试方法以及半导体集成电路
    • US06621283B1
    • 2003-09-16
    • US09437221
    • 1999-11-10
    • Yasurou MatsuzakiMasao NakanoToshiya UchidaAtsushi HatakeyamaKenichi KawasakiYasuhiro Fujii
    • Yasurou MatsuzakiMasao NakanoToshiya UchidaAtsushi HatakeyamaKenichi KawasakiYasuhiro Fujii
    • G01R3102
    • G11C29/022G11C29/02
    • A semiconductor device mounted on a board or the like and having a test circuit, having the function of carrying out a contact test at a low cost on the terminals of the semiconductor, is disclosed. The semiconductor device comprises a terminal test circuit for testing a state of a contact of an external terminal and a test mode control circuit unit. The test mode control circuit unit outputs a signal indicating a first operation mode upon application of a power supply voltage thereto, outputs a test mode signal to the terminal test circuit in response to a control signal input to a specific terminal such as a chip select terminal, and outputs a signal indicating a second operation mode in response to the number of times in which the level of the control signal input to the specific terminal changes. Preferably, the first operation mode is a terminal test mode, and the second operation mode is a normal operation mode. A method of testing the semiconductor device and a semiconductor integrated circuit, having the test circuit, are also disclosed.
    • 公开了一种安装在板等上并具有测试电路的半导体器件,具有在半导体端子上以低成本进行接触测试的功能。 半导体器件包括用于测试外部端子和测试模式控制电路单元的接触状态的端子测试电路。 测试模式控制电路单元在施加电源电压时输出指示第一操作模式的信号,响应于输入到诸如芯片选择端子的特定终端的控制信号,向终端测试电路输出测试模式信号 并且响应于输入到特定终端的控制信号的电平改变的次数而输出指示第二操作模式的信号。 优选地,第一操作模式是终端测试模式,并且第二操作模式是正常操作模式。 还公开了一种测试半导体器件的方法和具有测试电路的半导体集成电路。
    • 10. 发明授权
    • DLL circuit
    • DLL电路
    • US06194930B1
    • 2001-02-27
    • US09320847
    • 1999-05-26
    • Yasurou MatsuzakiMasao NakanoYasuhiro Fujii
    • Yasurou MatsuzakiMasao NakanoYasuhiro Fujii
    • H03L706
    • H03L7/0805H03L7/0814
    • The present invention is a DLL circuit, which delays a first clock, and generates a control clock having a predetermined phase relation with this first clock. The DLL circuit comprises a variable delay circuit for varying the delay of the first clock; a phase comparator for comparing the phases of the first clock against that of a second clock, generated by delaying for a predetermined time the output of the variable delay circuit, and for generating a phase comparison result signal; and a delay control circuit for supplying to the variable delay circuit a delay control signal, which controls this delay quantity in response to the phase comparison result signal. The delay control circuit generates a single delay control signal, which changes by a minimum delay quantity unit a delay quantity of the variable delay circuit in a first operating period of the DLL circuit, and generates a binary delay control signal, which changes by a binary unit a delay quantity of the variable delay circuit in a second operating period that differs from the first operating period of the DLL circuit. A lock-on state can be achieved in a short time, and stable operation is possible.
    • 本发明是一种DLL电路,其延迟第一时钟,并产生与该第一时钟具有预定相位关系的控制时钟。 DLL电路包括用于改变第一时钟的延迟的可变延迟电路; 相位比较器,用于通过将可变延迟电路的输出延迟预定时间并产生相位比较结果信号而产生的第一时钟的相位和第二时钟的相位; 以及延迟控制电路,用于向可变延迟电路提供响应于相位比较结果信号来控制该延迟量的延迟控制信号。 延迟控制电路产生单个延迟控制信号,该延迟控制信号在DLL电路的第一操作周期中以最小延迟量单位改变可变延迟电路的延迟量,并产生二进制延迟控制信号,二进制延迟控制信号由二进制 在与DLL电路的第一操作周期不同的第二操作周期中单元可变延迟电路的延迟量。 可以在短时间内实现锁定状态,并且可以稳定地操作。