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    • 5. 发明授权
    • Fast read/write cycle memory device having a self-timed read/write control circuit
    • 具有自定时读/写控制电路的快速读/写周期存储器件
    • US06392957B1
    • 2002-05-21
    • US09728377
    • 2000-11-28
    • Alexander ShubatAdam KablanianJaroslav RaszkaRichard S. Roy
    • Alexander ShubatAdam KablanianJaroslav RaszkaRichard S. Roy
    • G11C722
    • G11C7/227G11C7/22G11C2207/104
    • A self-timed write control memory device minimizes the memory cycle time for the cells of the array. The self-timed write control memory device preferably comprises an X-decoder, a word-line driver, a memory cell array, control logic, pre-charge circuits, sense amplifiers, a reference decoder, and a reference word-line driver. The memory device preferably further includes a first reference cell, a second reference cell or logic, a first reference column, a second reference column and a reference sense amplifier. The first reference cell is preferably used for detection of read cycle completion and the second reference cell or logic is used for detection of write cycle completion. The output of the first reference cell and second reference cell are preferably coupled to inputs of a unique reference sense amplifier. The sense amplifier includes special circuitry that uses either the output of the first reference cell or the second reference cell to generate the self-timed clock and there by minimizes the memory cycle time. The second reference cell may be any one of a conventional memory cell or write reference logic.
    • 自定时的写入控制存储器件最小化阵列的单元的存储器周期时间。 自定时写控制存储器件优选地包括X解码器,字线驱动器,存储单元阵列,控制逻辑,预充电电路,读出放大器,参考解码器和参考字线驱动器。 存储器件优选地还包括第一参考单元,第二参考单元或逻辑,第一参考列,第二参考列和参考读出放大器。 第一参考单元优选地用于检测读周期完成,并且第二参考单元或逻辑用于检测写周期完成。 第一参考单元和第二参考单元的输出优选地耦合到唯一参考读出放大器的输入。 读出放大器包括专用电路,其使用第一参考单元或第二参考单元的输出来产生自定时钟,并且通过使存储器周期时间最小化。 第二参考单元可以是常规存储单元或写入参考逻辑中的任何一个。
    • 7. 发明授权
    • Peripheral port with volatile and non-volatile configuration
    • 具有易失性和非易失性配置的外围端口
    • US5402014A
    • 1995-03-28
    • US91795
    • 1993-07-14
    • Arye ZiklikAlexander ShubatYoram CedarJohn H. Pasternak
    • Arye ZiklikAlexander ShubatYoram CedarJohn H. Pasternak
    • H03K19/177H03K19/173
    • H03K19/17708
    • An embodiment of this invention provides an integrated circuit (IC) having a configurable peripheral port which includes an input/output pin, a multiplexer coupled to the input/output pin, volatile configuration bits to control the multiplexer, and non-volatile configuration bits to control the multiplexer and override the volatile configuration bits. One embodiment of an IC also includes a peripheral port as above and functional units, such as programmable array logic (PAL) and erasable programmable read only memory (EPROM), coupled to the multiplexer. In another embodiment, a non-volatile configuration bit from a functional unit configures an input/output pin when the configuration bit is not needed by the functional unit.
    • 本发明的实施例提供了一种具有可配置外围端口的集成电路(IC),其包括输入/​​输出引脚,耦合到输入/输出引脚的多路复用器,用于控制多路复用器的易失性配置位,以及非易失性配置位 控制多路复用器并覆盖易失性配置位。 IC的一个实施例还包括如上的外围端口和耦合到多路复用器的功能单元,诸如可编程阵列逻辑(PAL)和可擦除可编程只读存储器(EPROM)。 在另一个实施例中,当功能单元不需要配置位时,来自功能单元的非易失性配置位配置输入/输出引脚。
    • 8. 发明授权
    • Decoder for a memory address bus
    • 解码器用于存储地址总线
    • US4961172A
    • 1990-10-02
    • US231122
    • 1988-08-11
    • Alexander ShubatYoram Cedar
    • Alexander ShubatYoram Cedar
    • G11C8/12G11C8/18
    • G11C8/12G11C8/18
    • A circuit constructed in accordance with my invention includes a microprocessor for generating addresses on an address bus, a plurality of memory devices, and a decoder for decoding the address on the address bus and generating select signals in response thereto. Of importance, the memory devices are also coupled to the address bus. A memory enable circuit is provided for enabling the memory devices before the decoder generates the select signals. Thus, the time required by the decoder to decode address signals does not add to the delay between the time an address is asserted by the microprocessor and the time one of the memory devices responds by providing data. In one embodiment, the memory enable circuit is incorporated into the bit line decoder of the memory devices. Thus, if one of the bit lines of the plurality of memory devices is selected to provide data, the memory device is enabled. Since the word line decoder is generally slower than the bit line decoder, inclusion of the memory enable circuit into the bit line decoder will not slow the memory devices. Also in one embodiment, the bit line decoder is programmable so that the memory devices can be mapped into different blocks of addresses within the microprocessor address space.
    • 根据本发明构造的电路包括用于在地址总线上产生地址的微处理器,多个存储器件以及用于对地址总线上的地址进行解码并响应于此产生选择信号的解码器。 重要的是,存储器件也耦合到地址总线。 提供存储器使能电路,用于在解码器产生选择信号之前使存储器件能够使能。 因此,解码器解码地址信号所需的时间不会增加微处理器断言的时间与存储器件的时间之一通过提供数据的响应之间的延迟。 在一个实施例中,存储器使能电路被并入到存储器件的位线解码器中。 因此,如果选择多个存储器件中的一个位线来提供数据,则存储器件被使能。 由于字线解码器通常比位线解码器慢,因此将存储器使能电路包括到位线解码器中将不会使存储器件减慢。 同样在一个实施例中,位线解码器是可编程的,使得存储器件可以被映射到微处理器地址空间内的不同地址块中。
    • 9. 发明授权
    • Output circuit for driving a memory device output lead including a
three-state inverting buffer and a transfer gate coupled between the
buffer input lead and the buffer output lead
    • 用于驱动存储器件输出引线的输出电路,其包括耦合在缓冲器输入引线和缓冲器输出引线之间的三态反相缓冲器和传输栅极
    • US4939392A
    • 1990-07-03
    • US231123
    • 1988-08-11
    • Alexander ShubatBarmak Sani
    • Alexander ShubatBarmak Sani
    • H03K19/0185H03K19/094
    • H03K19/018557H03K19/09429
    • A novel circuit is coupled to a memory device sense amplifier and a memory device output pin for driving the output pin with data. The circuit includes a first inverter (18) and a second inverter (100) coupled to the first inverter. Transfer gates (30, 104) are coupled across the input and output leads of the first and second inverters, respectively. During a first mode of operation, the first and second transfer gates are closed and the second inverter is three-stated so that the input and output leads of the first and second inverters are held at a voltage between VCC and ground. When it is desired to drive the memory device output pin with data, the first and second transfer gates open, and the second inverter leaves the three-state mode and goes into a low output impedance mode. Because the input and output leads of the first and second inverters are held at a voltage between VCC and ground when the transfer gates are closed, when the transfer gates open, the delay between the time the transfer gates open and the time valid output data appears on the output lead of the second inverter is minimized. The second inverter comprises large transistors and can therefore provide a large output current. However, because the second inverter is three-stated when the second transfer gate is closed, the circuit draws minimal power when the first and second transfer gates are closed.
    • 一个新颖的电路耦合到存储器件读出放大器和存储器件输出引脚,用于用数据驱动输出引脚。 电路包括耦合到第一反相器的第一反相器(18)和第二反相器(100)。 转移门(​​30,104)分别耦合在第一和第二逆变器的输入和输出引线上。 在第一操作模式下,第一和第二传输门关闭,第二反相器是三态的,使得第一和第二反相器的输入和输出引线保持在VCC和地之间的电压。 当需要用数据驱动存储器件输出引脚时,第一和第二传输门打开,第二个反相器退出三态模式并进入低输出阻抗模式。 由于当传输门关闭时,第一和第二反相器的输入和输出引线保持在VCC和地之间的电压,当传输门打开时,传输门打开时间和时间有效输出数据之间的延迟出现 在第二反相器的输出引线上最小化。 第二反相器包括大晶体管,因此可以提供大的输出电流。 然而,由于当第二传输门关闭时第二反相器是三态的,所以当第一和第二传输门关闭时,电路消耗最小的功率。