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    • 2. 发明授权
    • 어드레스 패턴 발생기
    • 地址模式发生器
    • KR100198521B1
    • 1999-06-15
    • KR1019950025631
    • 1995-08-21
    • 가부시키가이샤 아드반테스트
    • 이나가키도루후지사키겐이치
    • G01R31/3183G11C29/00
    • G06F9/34G01R31/31813G01R31/31921G11C29/18G11C29/20
    • An address pattern generator for testing a semiconductor device, particularly, a synchronous DRAM (SDRAM) is disclosed. The address pattern generator can switch an interleave mode and a sequential mode of address generation for a SDRAM during a test process in real time and generates column addresses for the SDRAM by a Y address generation section alone. The address generator includes an address selector that selects and outputs from a lower Y address signal, a Z address signal, and an operation mode control signal, a conversion memory that outputs data based on a conversion table, a multiplexer that selects and outputs an output from the conversion memory and the lower Y address signal in accordance with a burst length control signal. In another aspect, the address pattern generator includes a counter that loads the lower address signal from the Y address generator section for the sequential mode while a fixed value for the interleave mode, an exclusive OR gate that receives an output signal of the counter to an input terminal and the lower address signal from the Y address generation section to the other input terminal, and a multiplexer that selects the output signal of the counter for the sequential mode and the output signal of the exclusive OR gate for the interleave mode.
    • 9. 发明授权
    • 메모리 시험장치
    • 记忆测试仪
    • KR1019960006486B1
    • 1996-05-16
    • KR1019930702827
    • 1993-02-02
    • 가부시키가이샤 아드반테스트
    • 후지사키겐이치
    • G06F12/16
    • G11C29/56G11C8/16G11C29/003G11C29/20G11C29/44
    • PCT No. PCT/JP93/00118 Sec. 371 Date Dec. 30, 1993 Sec. 102(e) Date Dec. 30, 1993 PCT Filed Feb. 2, 1993 PCT Pub. No. WO93/15462 PCT Pub. Date Aug. 5, 1993.A failure analysis memory (7) having main and sub failure analysis memories (7a, 7b) has two counters (C1, C2), a multiplexer (MUX), two registers (RG1, RG2)and a comparator 14. A value corresponding to the size of a column address of a memory under test (2) is set in the register (RG1) and a stop address is set in the register (RG2). Each time a SAM part (2b) of the memory under test sequentially outputs data in an address area specified by a transfer row address and a start address, one of the counters is incremented on a one-by-one basis from a start address set therein, and its count value is selected by the multiplexer (MUX) and output as a sub address signal (SA'). During this time, the other counter in the non-counting state loads therein a main address specifying data that a RAM part 2a transfers next. When the memory under test operates in a simple read/transfer mode or a split read/transfer mode, a column address in the output from the multiplexer (MUX) is compared by the comparator (14) with the value set in the register (RG1). When the memory under test operates in a stop control split read/transfer mode the column address is compared with the value set in the register (RG2). When coincidence is detected by the comparator (14), a controller (12) switches the counting and non-counting states of the counters (C1, C2).