JPS54135577A - Frequency measuring apparatus - Google Patents

Frequency measuring apparatus

Info

Publication number
JPS54135577A
JPS54135577A JP4368478A JP4368478A JPS54135577A JP S54135577 A JPS54135577 A JP S54135577A JP 4368478 A JP4368478 A JP 4368478A JP 4368478 A JP4368478 A JP 4368478A JP S54135577 A JPS54135577 A JP S54135577A
Authority
JP
Japan
Prior art keywords
frequency
comparison
shift register
analog signal
measuring apparatus
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.)
Granted
Application number
JP4368478A
Other languages
Japanese (ja)
Other versions
JPS601585B2 (en
Inventor
Minoru Ozaki
Takeshi Onishi
Kunimaro Tanaka
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 JP4368478A priority Critical patent/JPS601585B2/en
Publication of JPS54135577A publication Critical patent/JPS54135577A/en
Publication of JPS601585B2 publication Critical patent/JPS601585B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

PURPOSE: To make possible to measure the frequency of original analog signal approximately in a simple constitution, by counting the changes of increase or decrease of sample values of PCM signals.
CONSTITUTION: The input PCM signal is supplied into a shift register 6 through a shift register 5, and the sample values stored in each register are compared 7 in each sample value. The result of comparison is, depending on the size, outputted as "1" or "0". And the output of comparison is counted 9 through a gate 8 only when the control signal of terminal 10 is "1". By dividing this count values by the counting time, the frequency of the original analog signal may be obtained approximately.
COPYRIGHT: (C)1979,JPO&Japio
JP4368478A 1978-04-13 1978-04-13 frequency measurement device Expired JPS601585B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4368478A JPS601585B2 (en) 1978-04-13 1978-04-13 frequency measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4368478A JPS601585B2 (en) 1978-04-13 1978-04-13 frequency measurement device

Publications (2)

Publication Number Publication Date
JPS54135577A true JPS54135577A (en) 1979-10-20
JPS601585B2 JPS601585B2 (en) 1985-01-16

Family

ID=12670660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4368478A Expired JPS601585B2 (en) 1978-04-13 1978-04-13 frequency measurement device

Country Status (1)

Country Link
JP (1) JPS601585B2 (en)

Also Published As

Publication number Publication date
JPS601585B2 (en) 1985-01-16

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