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    • 1. 发明授权
    • Differential capacitance sense amplifier
    • 差分电容读出放大器
    • US06803794B2
    • 2004-10-12
    • US10375563
    • 2003-02-26
    • Mark V. MartinJohn J. Drab
    • Mark V. MartinJohn J. Drab
    • G01R1900
    • G11C7/067G01R27/2605G11C11/22
    • A differential capacitance sense amplifier capable of measuring a small difference-signal capacitance in the presence of circuit mismatches and large unequal interconnect capacitances. The sense amplifier includes three sections: a common-mode section applies a ‘read’ voltage to two capacitors in a manner that rejects unequal interconnect capacitance, a difference-mode section generates a signal proportional to the capacitance difference between the two capacitors, and an offset-canceling section compensates for circuit mismatches in the difference-mode section. The amplifier can be adapted for use as a sense amplifier for a ferroelectric differential capacitance memory unit.
    • 一种差分电容读出放大器,能够在存在电路失配和大的不相等互连电容的情况下测量小的差分信号电容。 感测放大器包括三个部分:共模部分以拒绝不相等的互连电容的方式对两个电容器施加“读取”电压,差模部分产生与两个电容器之间的电容差成比例的信号, 偏移消除部分补偿差模式部分中的电路不匹配。 放大器可以适用于铁电差动电容存储单元的读出放大器。
    • 2. 发明授权
    • Auto correction algorithm for piece-wise linear circuits
    • 分段线性电路的自动校正算法
    • US06774828B1
    • 2004-08-10
    • US10761887
    • 2004-01-20
    • Norman C. LeeMark V. Martin
    • Norman C. LeeMark V. Martin
    • H03M112
    • H03M1/0687H03M1/1235
    • Conversion errors of the prior art are reduced by a piece wise linear analog to digital converter. The analog to digital (A/D) converter operates between a minimum voltage and a maximum voltage and uses one or more comparators to generate one or more digital bits, each of the digital bits representative of a conversion voltage. A first voltage interval is allocated for linear analog to digital conversion. This first voltage interval extends from the minimum voltage to an intermediate voltage, where the intermediate voltage is less than the maximum voltage. A second voltage interval extends from the intermediate voltage to the maximum voltage. An error correcting band is encoded in the analog signal between the first voltage interval and the second voltage interval. Each of the comparators used in the A/D has a sensing level. The error correcting band is centered with respect to one of the sensing levels, the sensing level located at the intermediate voltage. The error correcting band extends over a correcting voltage. The correcting voltage is a fraction of the conversion voltage.
    • 现有技术的转换误差由分段线性模数转换器减少。 模数(A / D)转换器在最小电压和最大电压之间工作,并使用一个或多个比较器来产生一个或多个数字位,每个数字位代表转换电压。 第一个电压间隔被分配用于线性模数转换。 该第一电压间隔从最小电压延伸到中间电压,其中中间电压小于最大电压。 第二电压间隔从中间电压延伸到最大电压。 在第一电压间隔和第二电压间隔之间的模拟信号中编码纠错带。每个A / D中使用的比较器具有感测电平。 误差校正带相对于感测电平之一中心,感测电平位于中间电压。 纠错带延伸超过校正电压。 校正电压是转换电压的一小部分。