JPS55138923A - Pulse width detecting device - Google Patents

Pulse width detecting device

Info

Publication number
JPS55138923A
JPS55138923A JP4778779A JP4778779A JPS55138923A JP S55138923 A JPS55138923 A JP S55138923A JP 4778779 A JP4778779 A JP 4778779A JP 4778779 A JP4778779 A JP 4778779A JP S55138923 A JPS55138923 A JP S55138923A
Authority
JP
Japan
Prior art keywords
pulse width
pulse
output
digital
constitution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4778779A
Other languages
Japanese (ja)
Inventor
Hatsuhiko Naito
Yoshitaka Ono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4778779A priority Critical patent/JPS55138923A/en
Publication of JPS55138923A publication Critical patent/JPS55138923A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
    • G01R29/027—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values
    • G01R29/0273—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values the pulse characteristic being duration, i.e. width (indicating that frequency of pulses is above or below a certain limit)

Abstract

PURPOSE:To simplify the constitution and to enhance the detection accuracy, by converting the pulse width to a digital signal. CONSTITUTION:A clock pulse from a clock pulse generator CLG and a pulse signal whose pulse width is varied together with the time from the terminal (in) are applied to the logical product gate AND. This AND output is applied to the counter COUNT 1, an output which has been counted in accordance with the input pulse width is fetched, it is compared with the reference level from the memory MEM by the digital comparator DC; when both have been matched, an output is generated to the one shot multivibrator OM, and a marker pulse is generated by this vibrator OM. The memory MEM stores a digital number corresponding to the pulse width to be detected, in each address, and provides a digital number in the address corresponding to the number of counts, which is output from the counter COUNT 2 by synchronizing with the marker pulse, to the comparator DC as a reference level.
JP4778779A 1979-04-17 1979-04-17 Pulse width detecting device Pending JPS55138923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4778779A JPS55138923A (en) 1979-04-17 1979-04-17 Pulse width detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4778779A JPS55138923A (en) 1979-04-17 1979-04-17 Pulse width detecting device

Publications (1)

Publication Number Publication Date
JPS55138923A true JPS55138923A (en) 1980-10-30

Family

ID=12785077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4778779A Pending JPS55138923A (en) 1979-04-17 1979-04-17 Pulse width detecting device

Country Status (1)

Country Link
JP (1) JPS55138923A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098349A2 (en) * 1982-06-15 1984-01-18 Kabushiki Kaisha Toshiba Frequency detecting circuit for digital information reproducing system
JPS6168615A (en) * 1984-09-12 1986-04-09 Hitachi Ltd Speed controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098349A2 (en) * 1982-06-15 1984-01-18 Kabushiki Kaisha Toshiba Frequency detecting circuit for digital information reproducing system
JPS6168615A (en) * 1984-09-12 1986-04-09 Hitachi Ltd Speed controller

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