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    • 4. 发明授权
    • Analog-to-digital converter
    • 模数转换器
    • US4644322A
    • 1987-02-17
    • US435965
    • 1982-10-22
    • Tsuneo Fujita
    • Tsuneo Fujita
    • H03M1/36H03M1/00H03M7/16
    • H03M1/1071H03M1/361
    • A parallel comparison type A/D converter comprises a voltage divider having 2.sup.N divider junctions connected in series between a reference voltage terminal and a ground potential terminal, 2.sup.N comparators for receiving as reference voltages the outputs of the respective divider junctions, a position detection logic circuit for receiving the outputs of the comparators, an encoder for receiving the output of the position detection logic circuit, and a code converter for receiving the output of the first digital encoder. The encoder adopts the Gray code format, and the code converter converts the Gray code format into the binary code format.
    • 并联比较型A / D转换器包括:一个分压器,具有2N个分压器串联连接在一个参考电压端子和一个地电位端子之间; 2N个比较器,用于接收相应的分压器结点的输出作为参考电压,一个位置检测逻辑电路 用于接收比较器的输出,用于接收位置检测逻辑电路的输出的编码器和用于接收第一数字编码器的输出的代码转换器。 编码器采用格雷码格式,代码转换器将格雷码格式转换为二进制码格式。
    • 5. 发明授权
    • Parallel comparison type analog to digital converter
    • 并行比较型模数转换器
    • US4596978A
    • 1986-06-24
    • US590618
    • 1984-03-19
    • Tsuneo Fujita
    • Tsuneo Fujita
    • H03M1/36H03M1/00
    • H03M1/0809H03M1/365
    • A parallel comparison type A/D converter which can produce a digital output with improved monotonic operation.The A/D converter comprises a plurality of comparators for comparing an analog signal with a plurality comparison voltage, and a plurality of logic gates each having a first input terminal of a positive logic and a second input terminal of a negative logic, one of the first and second input terminals receiving an outpt signal from one of the comparators of a certain weight and the other of the first and second input terminals receiving an output signal from the comparator having a weight subsequent to the certain weight. The threshold values of the first and second input terminals are made different from each other.
    • 一种并行比较型A / D转换器,可以产生具有改进的单调操作的数字输出。 A / D转换器包括用于将模拟信号与多个比较电压进行比较的多个比较器,以及多个逻辑门,每个具有正逻辑的第一输入端和负逻辑的第二输入端, 第一和第二输入端子接收来自某一权重的比较器中的一个输出信号,而第一和第二输入端子中的另一个接收来自具有一定重量之后的权重的比较器的输出信号。 使第一和第二输入端子的阈值彼此不同。
    • 6. 发明授权
    • Peak voltage holding circuit
    • 峰值电压保持电路
    • US4987323A
    • 1991-01-22
    • US385818
    • 1989-07-27
    • Tsuneo Fujita
    • Tsuneo Fujita
    • G01R19/04
    • G01R19/04
    • In a peak voltage holding circuit, a leakage circuit includes a first-stage mirror circuit, a second-stage mirror circuit, a selecting circuit, a capacitor, and a control circuit. The first-stage mirror circuit has one end connected to a second potential. The second-stage mirror circuit has one end connected to the output side of an input circuit and the other end connected to a first potential, and causes a current corresponding to a current which flows through the first-stage mirror circuit connected to the first potential to flow out from the voltage holding capacitor. The selecting circuit is connected the other end of the first-stage mirror circuit. The capacitor has one end connected to the selecting circuit and the other end connected to the first potential. The control circuit is connected to the selecting circuit and controls an operation of the selecting circuit. The selecting circuit alternately connects one end of the capacitor to the other end of the first-stage mirror circuit and the first potential at every arbitrary period.
    • 在峰值电压保持电路中,泄漏电路包括第一级镜电路,第二级镜电路,选择电路,电容器和控制电路。 第一级镜电路的一端连接到第二电位。 第二级镜电路的一端连接到输入电路的输出侧,另一端连接到第一电位,并且引起与流过连接到第一电位的第一级镜电路的电流相对应的电流 从保压电容器流出。 选择电路连接在第一级镜电路的另一端。 电容器的一端连接到选择电路,另一端连接到第一电位。 控制电路连接到选择电路并控制选择电路的操作。 选择电路在每个任意时段将电容器的一端交替地连接到第一级反射镜电路的另一端和第一电位。