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    Spectrophotometer with line frequency slaved voltage-to-frequency converter system
    43.
    发明公开
    Spectrophotometer with line frequency slaved voltage-to-frequency converter system 失效
    分光光度计，Netzfrequenzgesteuertem Spannungsfrequenzumsetzersystem。

    公开(公告)号：EP0266682A2

    公开(公告)日：1988-05-11

    申请号：EP87115917.4

    申请日：1987-10-29

    Applicant: THE PERKIN-ELMER CORPORATION

    Inventor： Wittmer, Charles M.

    IPC: H03M1/60 ,  G01J3/42

    CPC classification number: G01J1/44 ,  G01J3/42 ,  G01J2001/4426 ,  H03M1/0624 ,  H03M1/185 ,  H03M1/60

    Abstract: The system includes a synchronous voltage-to-­frequency converter connected to receive an analog input signal voltage and to generate a train of output pulses. A counter is connected to receive and count the ouput pulses and a digital register is connected to the counter for periodically receiving and storing the count in the counter. A conversion interval timer circuit is connected to control the operation of the counter and the register to determine a conversion interval during which the output pulses form the synchronous voltage-to-frequency converter are accumulated in the counter and then stored in the register. The conversion interval timer circuit is operable to determine the end of a prior conversion interval and the beginning of a new conversion interval in response to a predetermined phase of a predetermined cycle of the ac power line voltage. A timer is provided for exact measurement of the duration of each conversion interval and a multiplier is provided for multiplying the number stored in the register by a function which is a reciprocal of the exact duration measurement from the timer to hereby correct the number for variations in the conversion interval.

    Abstract translation: 该系统包括连接以接收模拟输入信号电压并产生一串输出脉冲的同步电压 - 频率转换器。 连接计数器以接收和计数输出脉冲，并且数字寄存器连接到计数器以周期性地接收和存储计数器中的计数。 连接转换间隔定时器电路以控制计数器和寄存器的操作，以确定形成同步电压 - 频率转换器的输出脉冲的转换间隔被累积在计数器中，然后存储在寄存器中。 转换间隔定时器电路可操作以响应于交流电源线电压的预定周期的预定相位来确定先前转换间隔的结束和新的转换间隔的开始。 提供了一个定时器用于精确测量每个转换间隔的持续时间，并且提供乘法器，用于将存储在寄存器中的数字乘以来自定时器的精确持续时间测量的倒数的函数，从而修正 转换间隔。

    Photometric device, and electronic apparatus
    44.
    发明专利
    Photometric device, and electronic apparatus 有权
    光电设备和电子设备

    公开(公告)号：JP2014025942A

    公开(公告)日：2014-02-06

    申请号：JP2013180062

    申请日：2013-08-30

    Applicant: Semiconductor Energy Lab Co Ltd ,  株式会社半導体エネルギー研究所

    Inventor： KOYAMA JUN ,  INOUE KIYOKO

    IPC: G01J1/44 ,  G01J1/42 ,  G09G3/20 ,  G09G3/36 ,  G09G5/00 ,  H01L31/10

    CPC classification number: G01J1/44 ,  G01J2001/4426 ,  H03F3/08

    Abstract: PROBLEM TO BE SOLVED: To provide a photometric device with a wide dynamic range.SOLUTION: A photometric device includes a constant current generation circuit, a fixed clock signal generation circuit which generates a fixed clock signal having a fixed frequency, a photoelectric conversion element, a variable clock signal generation circuit, and a digital signal generation circuit. The fixed clock signal generation circuit generates, from a constant current, a fixed clock signal that oscillates at a fixed frequency. The variable clock signal generation circuit generates, from photocurrent generated in the photoelectric conversion element, a variable clock signal that oscillates at a frequency proportional to an amount of photocurrent. The digital signal generation circuit sets a measurement period with use of the fixed clock signal, counts a number of pulses of the variable clock signal that oscillates during the measurement period, and generates a digital signal including the count value as data.

    Abstract translation: 要解决的问题：提供具有宽动态范围的测光装置。解决方案：一种测光装置，包括恒流产生电路，产生具有固定频率的固定时钟信号的固定时钟信号产生电路，光电转换元件， 可变时钟信号发生电路和数字信号发生电路。 固定时钟信号产生电路从恒定电流产生以固定频率振荡的固定时钟信号。 可变时钟信号产生电路从光电转换元件中产生的光电流产生以与光电流量成比例的频率振荡的可变时钟信号。 数字信号发生电路使用固定时钟信号设定测量周期，对在测量周期期间振荡的可变时钟信号的脉冲数进行计数，并产生包括计数值的数字信号作为数据。

    Photometric equipment
    45.
    发明专利
    Photometric equipment 有权

    公开(公告)号：JP5357637B2

    公开(公告)日：2013-12-04

    申请号：JP2009148289

    申请日：2009-06-23

    Applicant: 株式会社半導体エネルギー研究所

    Inventor： 潤 小山 ,  聖子 天野

    IPC: G01J1/44 ,  G01J1/42 ,  G09G5/00

    CPC classification number: G01J1/44 ,  G01J2001/4426 ,  H03F3/08

    Abstract: A photometric device with a wide dynamic range. The photometric device includes a constant current generation circuit (104), a fixed clock signal generation circuit (105) which generates a fixed clock signal having a fixed frequency, a photoelectric conversion element (100), a variable clock signal generation circuit (101), and a digital signal generation circuit (103). The fixed clock signal generation circuit generates a fixed clock signal that oscillates at a fixed frequency, from constant current. The variable clock signal generation circuit generates a variable clock signal that oscillates at a frequency proportional to the amount of photocurrent, from photocurrent generated in the photoelectric conversion element. The digital signal generation circuit sets a measurement period using the fixed clock signal, counts the number of pulses of the variable clock signal that oscillates for the measurement period, and outputs a digital signal including the count value as data.

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