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    • 4. 发明专利
    • Phase difference output device
    • 相差输出装置
    • JPS60191504A
    • 1985-09-30
    • JP4798484
    • 1984-03-13
    • Toshiba Corp
    • IKOMA KUNITOSHI
    • H02P29/00H03D13/00
    • H03D13/001
    • PURPOSE:To obtain easily an output signal of a desired and optional characteristic by detecting a phase difference between two signals and processing an error signal digitally. CONSTITUTION:A counter 11 counts a clock signal CL generated while an FF circuit 12 is set by a reference frequency signal FR and reset by a comparison frequency signal FO. An output of the counter 11 responds to a phase difference between the reference frequency signal FR and the comparison frequency signal FO. Then the output of the computer 11 is given to a data converter 13, which converts data based on a prescribed characteristic. After the phase error signal from the converter 13 is converted by a D-A converter 14, the signal is outputted as an analog signal via an LPF15. The output signal of a desired optional characteristic is obtained easily in this way.
    • 目的:通过检测两个信号之间的相位差并以数字方式处理误差信号,轻松获得所需和可选特性的输出信号。 构成:计数器11对FF电路12由参考频率信号FR设置并由比较频率信号FO复位而产生的时钟信号CL进行计数。 计数器11的输出响应参考频率信号FR和比较频率信号FO之间的相位差。 然后,计算机11的输出被提供给数据转换器13,数据转换器13基于规定的特性转换数据。 在来自转换器13的相位误差信号被D-A转换器14转换之后,该信号通过LPF15作为模拟信号输出。 以这种方式容易地获得期望的可选特性的输出信号。
    • 8. 发明申请
    • PROGRAMMABLE SENSITIVITY FREQUENCY COINCIDENCE DETECTION CIRCUIT AND METHOD
    • 可编程灵敏度频率检测电路和方法
    • US20090108879A1
    • 2009-04-30
    • US11928080
    • 2007-10-30
    • Ram KelkarGrant P. Kesselring
    • Ram KelkarGrant P. Kesselring
    • G01R23/15
    • G01R23/005H03D13/001
    • A frequency coincidence detection circuit for detecting frequency edges for each of a plurality of periodic digital signals. The circuit generates count indicators for each of the periodic digital signals and compares each of the count indicators to a programmable sensitivity input to determine a coincidence window for the corresponding one of each of the periodic digital signals. The circuit determines a signal coincidence of the coincidence windows. In another embodiment, a frequency coincidence detection method is provided. The method detects frequency edges for each of a plurality of periodic digital signals, generates count indicators for each of the periodic digital signals and compares each of the count indicators to a programmable sensitivity input to determine a coincidence window for the corresponding one of each of the periodic digital signals. The method determines a signal coincidence of the coincidence windows.
    • 一种用于检测多个周期数字信号中的每一个的频率边缘的频率一致检测电路。 电路产生每个周期性数字信号的计数指示器,并将每个计数指示器与可编程灵敏度输入进行比较,以确定每个周期性数字信号中的相应一个的一致窗口。 电路确定符合窗口的信号重合。 在另一个实施例中,提供了一种频率一致检测方法。 该方法检测多个周期性数字信号中的每一个的频率边缘,为每个周期性数字信号产生计数指示符,并将每个计数指示符与可编程灵敏度输入进行比较,以确定每个周期数字信号中的每一个的相应窗口 周期性数字信号。 该方法确定符合窗口的信号重合。
    • 10. 发明授权
    • Comparator
    • 比较器
    • US06735265B1
    • 2004-05-11
    • US09614208
    • 2000-07-11
    • Akira Yasuda
    • Akira Yasuda
    • H03D324
    • H03D13/001
    • A comparator compares a first binary input signal and a second binary input signal each binalized. A generator generates a reset signal at each rising edge or each falling edge of the first input signal. A counter counts the second input signal at each timing determined by the reset signal. The counted value represents a ratio of each frequency of the first input signal and the second input signal. A subtractor calculates a difference between the counted value and a set value representing a predetermined ratio of each frequency of the first input signal and the second input signal. An integrator integrates the difference. The integrated value represents a phase difference of the frequencies of the first input signal and the second input signal.
    • 比较器比较第一二进制输入信号和每个二进制的第二二进制输入信号。 发生器在第一输入信号的每个上升沿或每个下降沿产生复位信号。 计数器在由复位信号确定的每个定时对第二输入信号进行计数。 计数值表示第一输入信号和第二输入信号的每个频率的比率。 减法器计算计数值和​​表示第一输入信号和第二输入信号的每个频率的预定比率的设定值之间的差。 集成商整合差异。 积分值表示第一输入信号和第二输入信号的频率的相位差。