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    • 1. 发明专利
    • Logical operation circuit and logic unit
    • 逻辑操作电路和逻辑单元
    • JP2005045746A
    • 2005-02-17
    • JP2003280520
    • 2003-07-25
    • Rohm Co Ltdローム株式会社
    • FUJIMORI TAKAKAZU
    • H03K19/185
    • H03K19/185
    • PROBLEM TO BE SOLVED: To provide a circuit and logic unit in which the logical operation of data can be performed by using a ferroelectric capacitor. SOLUTION: The area ratio of ferroelectric capacitors CF1, CF2 is set to enlarge the potential difference Vdef itself between a voltage Va1 and a voltage Va0 as much as possible, and a threshold voltage Vth of a transistor MP is approximately set to 1/2×(Va0+Va1). Therefore, the ON/OFF operation margin of the transistor MP can be extremely enlarged. As a result, high-speed reading can be performed without using an amplifier circuit such as a sense amplifier. Furthermore, the sense amplifier is not used, thereby facilitating high integration. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供可以通过使用铁电电容器来执行数据的逻辑运算的电路和逻辑单元。 解决方案:设置强电介质电容器CF1,CF2的面积比尽可能地扩大电压Va1和电压Va0之间的电位差Vdef本身,晶体管MP的阈值电压Vth近似设定为1 / 2×(VA0 + VA1)。 因此,可以极大地增大晶体管MP的导通/截止操作余量。 结果,可以在不使用诸如读出放大器的放大器电路的情况下执行高速读取。 此外,不使用读出放大器,从而有助于高集成度。 版权所有(C)2005,JPO&NCIPI
    • 2. 发明专利
    • Arithmetic operation processing circuit and arithmetic operation method using ferroelectric capacitor
    • 使用电磁电容的算术运算处理电路和算术运算方法
    • JP2007213747A
    • 2007-08-23
    • JP2006035543
    • 2006-02-13
    • Rohm Co Ltdローム株式会社
    • KIMURA KEIMEI
    • G11C11/22
    • G11C11/22H03K19/185
    • PROBLEM TO BE SOLVED: To improve arithmetic operation efficiency of an arithmetic operation processing circuit using a ferroelectric capacitor. SOLUTION: An arithmetic operation processing device 100 executes logical calculation of input data X(t) and data X(t-1) stored in a memory. A ferroelectric capacitor Cs includes first and second terminals 21 and 22 and functions as a memory. A bit line driver BLDj switches voltages applied to the first and second terminals 21 and 22 of the ferroelectric capacitor Cs according to the input data X(t). A sense amplifier SAj outputs a calculation result according to a voltage appearing in one of the first and second terminals 21 and 22 of the ferroelectric capacitor Cs. For example, the bit line driver BLDj switches the direction of a voltage applied to the ferroelectric capacitor Cs according to the input data X(t). COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提高使用铁电电容器的算术运算处理电路的算术运算效率。 解决方案:算术运算处理装置100执行存储在存储器中的输入数据X(t)和数据X(t-1)的逻辑运算。 铁电电容器Cs包括第一端子21和第二端子22,并且用作存储器。 根据输入数据X(t),位线驱动器BLDj切换施加到强电介质电容器Cs的第一和第二端子21和22的电压。 读出放大器SAj根据出现在强电介质电容器Cs的第一端子21和第二端子22之一中的电压输出计算结果。 例如,位线驱动器BLDj根据输入数据X(t)切换施加到铁电体电容器Cs的电压的方向。 版权所有(C)2007,JPO&INPIT