公开(公告)号：US4382198A

公开(公告)日：1983-05-03

申请号：US218605

申请日：1980-12-22

Applicant: Yasumori Ishijima ,  Rikichi Murooka

Inventor： Yasumori Ishijima ,  Rikichi Murooka

IPC: H03G11/00 ,  H03G11/02 ,  H03K5/08

CPC classification number: H03G11/02 ,  H03G11/00

Abstract: An amplitude limiter circuit is provided in which the output terminal is disconnected from the input terminal, or the input signal source, when the input signal amplitude exceeds the predetermined upper and/or lower limit. Voltage maintenance means maintains the output voltage when the amplitude limiting condition is reached.

Abstract translation: 提供了一种幅度限制器电路，其中当输入信号振幅超过预定的上限和/或下限时，输出端与输入端或输入信号源断开。 当达到限幅条件时，电压维持装置维持输出电压。

公开(公告)号：US4623984A

公开(公告)日：1986-11-18

申请号：US763325

申请日：1985-08-07

Applicant: Hidemi Yokokawa ,  Rikichi Murooka ,  Miyuki Fukuzawa ,  Machiko Tomioka

Inventor： Hidemi Yokokawa ,  Rikichi Murooka ,  Miyuki Fukuzawa ,  Machiko Tomioka

IPC: G01R31/3177 ,  G06F11/25 ,  G06F3/153

CPC classification number: G01R31/3177 ,  G06F11/25

Abstract: A logic analyzer is disclosed which displays at least an input logic signal on a cathode ray tube, controls a cursor position on the cathode ray tube and obtains a relationship between a predetermined phenomenon included in the input logic signal and the cursor position. In a search mode, the predetermined phenomenon is a search word or a glitch. In a compare mode, the predetermined phenomenon is a reference logic signal.

Abstract translation: 公开了一种逻辑分析仪，其在阴极射线管上至少显示输入逻辑信号，控制阴极射线管上的光标位置，并获得输入逻辑信号中包含的预定现象与光标位置之间的关系。 在搜索模式中，预定的现象是搜索词或毛刺。 在比较模式中，预定现象是参考逻辑信号。

公开(公告)号：US4227121A

公开(公告)日：1980-10-07

申请号：US922927

申请日：1978-07-07

Applicant: Yasumori Ishijima ,  Rikichi Murooka

Inventor： Yasumori Ishijima ,  Rikichi Murooka

IPC: G01R13/22 ,  G01R13/34 ,  H01J29/70 ,  H01J29/72

CPC classification number: G01R13/34 ,  G01R13/22

Abstract: A waveform observing method and apparatus incorporating signal sampling and digital technologies is disclosed. An input signal to be observed is compared with the output from a digital-to-analog converter and the comparison output is used for controlling display means such as a cathode-ray tube. A wideband input signal can be measured with much higher accuracy than the conventional apparatus.

Abstract translation: 公开了一种结合信号采样和数字技术的波形观测方法和装置。 将要观察的输入信号与来自数模转换器的输出进行比较，并且比较输出用于控制诸如阴极射线管的显示装置。 可以以比常规装置高得多的精度测量宽带输入信号。

公开(公告)号：US4736189A

公开(公告)日：1988-04-05

申请号：US916607

申请日：1986-10-08

Applicant: Hiromi Katsumata ,  Rikichi Murooka ,  Takeko Yumoto

Inventor： Hiromi Katsumata ,  Rikichi Murooka ,  Takeko Yumoto

IPC: H03M1/10 ,  H03M1/00

CPC classification number: H03M1/1019 ,  H03M1/121

Abstract: The phase relation of clock signals to be applied to an interleave type analog-to-digital conversion apparatus having N analog-to-digital converters is calibrated by applying a repetitive reference signal to the N analog-to-digital converters. The digital values from the N analog-to-digital converters are selected at corresponding sampling points of successive cycles of the reference signal. The clock phase relation is adjusted such that the selected digital values are made substantially equal to each other.

Abstract translation: 通过向N个模数转换器施加重复的参考信号来校准要施加到具有N个模拟 - 数字转换器的交错型模数转换装置的时钟信号的相位关系。 来自N个模拟 - 数字转换器的数字值在参考信号的连续周期的相应采样点被选择。 调整时钟相位关系，使得所选择的数字值彼此基本相等。

公开(公告)号：US4364027A

公开(公告)日：1982-12-14

申请号：US232481

申请日：1981-02-09

Applicant: Rikichi Murooka

Inventor： Rikichi Murooka

IPC: H03M1/10 ,  G01R13/06 ,  G01R13/20 ,  G01R35/00 ,  H03M1/00 ,  H03M1/18 ,  H03K13/02

CPC classification number: G01R35/005 ,  G01R13/06 ,  H03M1/10

Abstract: A calibration apparatus for analog-to-digital converter or transient recorder including both analog and digital sections is disclosed. A built-in calibrator automatically calibrates the gain and DC level of the entire system to substantially the same accuracy as that of the digital section, thereby avoiding relatively large errors of the analog section. The amplitude or gain calibration is always performed over the full range of the digitizer used in the digital section.

Abstract translation: 公开了一种用于模数转换器或包括模拟和数字部分的瞬态记录器的校准装置。 内置校准器可自动校准整个系统的增益和直流电平，使其与数字部分的精度基本相同，从而避免了模拟部分相对较大的误差。 幅度或增益校准始终在数字部分使用的数字转换器的全范围内执行。

公开(公告)号：US4345241A

公开(公告)日：1982-08-17

申请号：US223979

申请日：1981-01-12

Applicant: Sumio Takeuchi ,  Rikichi Murooka ,  Jun Sakamoto

Inventor： Sumio Takeuchi ,  Rikichi Murooka ,  Jun Sakamoto

IPC: H03M1/10 ,  H03M1/06 ,  H03M1/08 ,  H03M1/12 ,  H03K13/02

CPC classification number: H03M1/0624 ,  H03M1/0836 ,  H03M1/1215

Abstract: A high speed analog-to-digital conversion method and apparatus including a plurality of parallel analog-to-digital converters is disclosed. A clock signal is applied to each of the analog-to-digital converters at different phase relation to increase the equivalent sampling frequency by multiplexing the outputs into a serial form. A reference signal such as a linear ramp or sawtooth signal is used to maintain the correct phase relation, thereby eliminating any errors due to differences in electrical characteristics among the analog-to-digital converters. Such correction may be performed automatically by using a CPU before digitizing an analog input signal or at any desired time.

Abstract translation: 公开了一种包括多个并行模数转换器的高速模数转换方法和装置。 时钟信号以不同的相位关系施加到每个模数转换器，以通过将输出复用为串行形式来增加等效采样频率。 使用诸如线性斜坡或锯齿波信号的参考信号来维持正确的相位关系，从而消除由于模数转换器之间的电特性差异而引起的任何错误。 可以在数字化模拟输入信号之前或在任何期望的时间通过使用CPU来自动执行这种校正。