Circuit for testing power-on-reset circuitry
    1.
    发明授权
    Circuit for testing power-on-reset circuitry 失效
    用于测试上电复位电路的电路

    公开(公告)号:US5450417A

    公开(公告)日:1995-09-12

    申请号:US149243

    申请日:1993-10-26

    IPC分类号: H03K3/356 H03K17/22 H04B17/00

    CPC分类号: H03K3/356008 H03K17/22

    摘要: The power-on-reset test circuit of this invention includes two imbalanced latches to detect the occurrence of a transient power-on-reset signal. The occurrence of a transient power-on-reset signal is latched for later verification during circuit testing. Both latches are designed to default to a low voltage output (Vss) on initial power-up. One of the latches is set by the power-on-reset signal to a high-voltage output (Vcc) state. The other latch is set by a reference-potential input to a low-voltage output state. If the set latch has a high-voltage output and the other latch has a low-voltage output, then the power-on-reset circuitry is functioning properly.

    摘要翻译: 本发明的上电复位测试电路包括两个不平衡锁存器,用于检测瞬态上电复位信号的发生。 瞬态上电复位信号的发生被锁存用于电路测试期间的后续验证。 两个锁存器都设计为在初始上电时默认为低电压输出(Vss)。 其中一个锁存器由上电复位信号设置为高电压输出(Vcc)状态。 另一个锁存器由参考电位输入设置为低电压输出状态。 如果设置的锁存器具有高电压输出,另一个锁存器具有低电压输出,则上电复位电路正常工作。

    High-voltage sensor for integrated circuits
    2.
    发明授权
    High-voltage sensor for integrated circuits 失效
    集成电路用高压传感器

    公开(公告)号:US5397946A

    公开(公告)日:1995-03-14

    申请号:US149246

    申请日:1993-10-26

    CPC分类号: G11C5/143 G11C16/225

    摘要: The CMOS high-voltage sensor circuit has a voltage reference including, for example, of four N-channel MOS transistors; one pass-gate P-channel transistor; one current-mirror P-channel MOS transistor; and a conventional high-voltage sensor including, for example, of two P-channel MOS transistors and one N-channel MOS transistor. The sensor circuit of this invention generates a high-voltage signal at the output if the input voltage is greater than both the reference voltage plus two P-channel threshold voltages and the supply voltage Vcc plus two P-channel threshold voltages. The power-up or power-down sequence may be in any order without adversely affecting the operation of the circuit of this invention.

    摘要翻译: CMOS高电压传感器电路具有包括例如四个N沟道MOS晶体管的电压基准; 一个通道P沟道晶体管; 一个电流镜P沟道MOS晶体管; 以及包括例如两个P沟道MOS晶体管和一个N沟道MOS晶体管的常规高压传感器。 如果输入电压大于参考电压加上两个P沟道阈值电压和电源电压Vcc加上两个P沟道阈值电压,本发明的传感器电路在输出端产生高电压信号。 上电或断电顺序可以是任何顺序,而不会不利地影响本发明的电路的操作。

    Method and device for detecting and controlling an array source signal
discharge for a memory erase operation
    3.
    发明授权
    Method and device for detecting and controlling an array source signal discharge for a memory erase operation 失效
    用于检测和控制用于存储器擦除操作的阵列源信号放电的方法和装置

    公开(公告)号:US5424992A

    公开(公告)日:1995-06-13

    申请号:US112484

    申请日:1993-08-25

    IPC分类号: G11C16/16 G11C13/00

    CPC分类号: G11C16/16

    摘要: An array source signal discharge controller device (10) includes a pulse converter circuit (12) that receives an erase pulse signal (ERPULSE). The pulse converter circuit (12) converts the erase pulse signal (ERPULSE) into a pulse control signal (ERPCL) that is subsequently translated into a higher voltage level bias signal (ECL.sub.--). The higher voltage level bias signal (ECL.sub.--) drives array source signal generator circuits (16) that produce array source signals (AS) to erase particular array subsections of memory as determined by a selection circuit (17). The array source signal generator circuits (16) also generate array source command signals (ASCOM.sub.--) to indicate a discharging status of all array source signals (AS). An erase completion detector circuit (18) monitors the array source command signals (ASCOM.sub.--) and generates an array source detect signal (ASDET) to indicate completion of array source signal (AS) discharging. The pulse converter circuit (12) receives the array source detect signal (ASDET) and generates an erase completion signal (ERCTR) and a pulldown control signal ERCTR.sub.-- to control final discharge of the array source signals (AS) and indicate that normal memory access may resume. The pulse converter circuit (12) also generates a pulldown signal (ERD.sub.--) that controls discharge of the array source signals (AS) by preventing current surges from appearing on the array source signals (AS) during discharge.

    摘要翻译: 阵列源信号放电控制器装置(10)包括接收擦除脉冲信号(ERPULSE)的脉冲转换器电路(12)。 脉冲转换器电路(12)将擦除脉冲信号(ERPULSE)转换成脉冲控制信号(ERPCL),随后将其转换为更高的电压电平偏置信号(ECL-)。 较高电压电平偏置信号(ECL-)驱动产生阵列源信号(AS)的阵列源信号发生器电路(16),以擦除由选择电路(17)确定的存储器的特定阵列子部分。 阵列源信号发生器电路(16)还产生阵列源指令信号(ASCOM-),以指示所有阵列源信号(AS)的放电状态。 擦除完成检测电路(18)监视阵列源指令信号(ASCOM-)并产生阵列源检测信号(ASDET),以指示阵列源信号(AS)放电完成。 脉冲转换器电路(12)接收阵列源检测信号(ASDET)并产生擦除完成信号(ERCTR)和下拉控制信号ERCTR-以控制阵列源信号(AS)的最终放电,并指示正常存储器存取 可能会恢复。 脉冲转换器电路(12)还通过在放电期间防止在阵列源信号(AS)上出现电流浪涌来产生控制阵列源信号(AS)的放电的下拉信号(ERD-)。

    Current-sensing power-on reset circuit for integrated circuits
    4.
    发明授权
    Current-sensing power-on reset circuit for integrated circuits 失效
    用于集成电路的电流感应上电复位电路

    公开(公告)号:US5396115A

    公开(公告)日:1995-03-07

    申请号:US149245

    申请日:1993-10-26

    IPC分类号: H03K5/04 H03K17/22

    摘要: The power-on reset circuit of this invention includes a current-sensing circuit, a pulse-stretching circuit, and a voltage-reference circuit. The voltage-reference circuit consists, for example, of one N-Channel and one P-Channel MOS transistor. The circuit of this invention uses a static voltage reference comprised of CMOS transistors to detect the power-up condition. The circuit of this invention improves detection of a transient power-supply voltage Vcc loss and detects that power-supply voltage transient on both rising and falling edges.

    摘要翻译: 本发明的上电复位电路包括电流检测电路,脉冲拉伸电路和电压参考电路。 电压基准电路例如由一个N沟道和一个P沟道MOS晶体管组成。 本发明的电路使用由CMOS晶体管组成的静态参考电压来检测上电状态。 本发明的电路改进了瞬态电源电压Vcc损耗的检测,并检测上升沿和下降沿的电源电压瞬变。

    Smart erase algorithm with secure scheme for flash EPROMs
    6.
    发明授权
    Smart erase algorithm with secure scheme for flash EPROMs 失效
    智能擦除算法,具有闪存EPROM的安全方案

    公开(公告)号:US5491809A

    公开(公告)日:1996-02-13

    申请号:US764

    申请日:1993-01-05

    摘要: A method for erasing blocks of a non-volatile memory includes detecting whether a block is in at least one of an erased state or a state secured from erasure; then setting a flag register at a first level for each block detected to be in at least one of an erased state or a state secured from erasure or at a second level for each block not so detected; then selecting for erasure blocks that have their respective flags set at the second level; and then erasing the selected blocks.

    摘要翻译: 一种用于擦除非易失性存储器的块的方法,包括:检测块是否处于擦除状态或从擦除中保护的状态中的至少一个; 然后将每个被检测到的块中的每个块设置为处于擦除状态或从擦除保护的状态中的至少一个或者对于不被检测到的每个块的第二级的标志寄存器; 然后选择其各自的标志设置在第二级的擦除块; 然后擦除所选的块。

    Nonvolatile memory array having local program load line repeaters
    7.
    发明授权
    Nonvolatile memory array having local program load line repeaters 失效
    具有本地程序加载线中继器的非易失性存储器阵列

    公开(公告)号:US06175520B1

    公开(公告)日:2001-01-16

    申请号:US08866094

    申请日:1997-05-30

    IPC分类号: G11C1134

    CPC分类号: H03M1/007 H03M1/206 H03M1/365

    摘要: A flash EPROM device (100) is disclosed. During a programming operation, a primary programming voltage circuit (116) drives I/O lines (110) to a programming voltage (Vp) according to input data values. Secondary programming voltage circuits (118) are located remotely from the primary programming voltage circuit (116) and further drive I/O lines to Vp in response to the voltage levels on the I/O lines. This arrangement reduces the effect on the load line response of the impedance intermediate the primary programming voltage circuit (116) and the secondary programming voltage circuits (118).

    摘要翻译: 闪存EPROM设备(100)被公开。 在编程操作期间,主编程电压电路(116)根据输入数据值将I / O线(110)驱动到编程电压(Vp)。 第二编程电压电路(118)远离主编程电压电路(116)定位,并且响应于I / O线上的电压电平进一步将I / O线驱动到Vp。 这种布置减少了对主编程电压电路(116)和次级编程电压电路(118)之间的阻抗的负载线响应的影响。