JPS56130664A - Frequency measuring system - Google Patents

Frequency measuring system

Info

Publication number
JPS56130664A
JPS56130664A JP3460080A JP3460080A JPS56130664A JP S56130664 A JPS56130664 A JP S56130664A JP 3460080 A JP3460080 A JP 3460080A JP 3460080 A JP3460080 A JP 3460080A JP S56130664 A JPS56130664 A JP S56130664A
Authority
JP
Japan
Prior art keywords
frequency
synchronizing
gate
time
gate signal
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
JP3460080A
Other languages
Japanese (ja)
Inventor
Michio Otsuka
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 JP3460080A priority Critical patent/JPS56130664A/en
Publication of JPS56130664A publication Critical patent/JPS56130664A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave

Abstract

PURPOSE:To measure a low frequency in a short time with a high precision by a simple constitution, by using the phase synchronizing circuit or the frequency synchronizing circuit to multiply the frequency. CONSTITUTION:Input signals 1 is processed by synchronizing pulse generator 2 to generate synchronizing pulses 3 of a pulse train synchronized with the frequency of input signal 1, and further, synchronizing clock 9 obtained by multiplying the frequency is generated by phase synchronizing circuit 8. After AND between synchronizing clock 9 and gate signal 5d from gate signal generator 4 which has the gate time of a fixed time interval is operated in counter 6, it is counted. As a result, even if the frequency of input signal 1 is low, the frequency is measured with a high precision in a short time without extending the gate time of gate signal 5.
JP3460080A 1980-03-18 1980-03-18 Frequency measuring system Pending JPS56130664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3460080A JPS56130664A (en) 1980-03-18 1980-03-18 Frequency measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3460080A JPS56130664A (en) 1980-03-18 1980-03-18 Frequency measuring system

Publications (1)

Publication Number Publication Date
JPS56130664A true JPS56130664A (en) 1981-10-13

Family

ID=12418831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3460080A Pending JPS56130664A (en) 1980-03-18 1980-03-18 Frequency measuring system

Country Status (1)

Country Link
JP (1) JPS56130664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010223780A (en) * 2009-03-24 2010-10-07 Nec Corp Measuring device, frequency-ratio measuring circuit, measuring method and program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010223780A (en) * 2009-03-24 2010-10-07 Nec Corp Measuring device, frequency-ratio measuring circuit, measuring method and program

Similar Documents

Publication Publication Date Title
CH641308B (en) DEVICE FOR MEASURING THE RUN TIME OF PULSE SIGNALS.
JPS5452578A (en) Stopwatch
GB2120039B (en) Apparatus for measuring the delay time of electrical pulse signals
JPS56130664A (en) Frequency measuring system
JPS5428669A (en) Noise measuring circuit
JPS53102784A (en) Distribution measuring instrument of sampling form
JPS5346015A (en) Glide effect device for electronic musical instrument
JPS6426164A (en) Speed detecting device
JPS5216251A (en) Pulse separator
JPS53104277A (en) Electronic watch
JPS5326166A (en) Measuring apparatus for clock time accuracy
JPS5246750A (en) Frequency detection circuit
JPS5465582A (en) Judgement circuit of chattering time
JPS52139477A (en) Frequency measuring system
JPS5679963A (en) Waveform measuring method and its device
JPS56102883A (en) Ultrasonic holography apparatus
JPS5426772A (en) Operational system
JPS57127860A (en) Measuring apparatus for input signal frequency in computer system
JPS5246871A (en) Device for measurement of automatic phase discriminating allowance
JPS57161666A (en) Circuit for detecting interval of signal inversion
JPS5696526A (en) Timing signal generating system
JPS5315168A (en) Pulse separation measuring system
JPS55149014A (en) Ultrasonic current meter
JPS5333041A (en) Frequency step-multiplication circuit
JPS5247772A (en) Signal generating device in electronic watches