JPS57207869A - Digitizing instantaneous frequency measuring device - Google Patents

Digitizing instantaneous frequency measuring device

Info

Publication number
JPS57207869A
JPS57207869A JP9427581A JP9427581A JPS57207869A JP S57207869 A JPS57207869 A JP S57207869A JP 9427581 A JP9427581 A JP 9427581A JP 9427581 A JP9427581 A JP 9427581A JP S57207869 A JPS57207869 A JP S57207869A
Authority
JP
Japan
Prior art keywords
signal
delay
phase
discriminating circuit
inputted
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
JP9427581A
Other languages
Japanese (ja)
Inventor
Naoyuki Minami
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 JP9427581A priority Critical patent/JPS57207869A/en
Publication of JPS57207869A publication Critical patent/JPS57207869A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measuring Phase Differences (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

PURPOSE:To use an I/Q phase discriminating circuit in common, to make a device small-sized, and also to elevate a frequency measuring accuracy, by switching and selecting plural delay signal whose delay time is different from each other, and inputting its selected signal to one I/Q phase discriminating circuit. CONSTITUTION:An inputted high frequency signal is distributed in phase, one input signal 15 is inputted to an I/Q phase discriminating circuit 6, and the other input signal is delayed by delaying circuits 5a-5c, respectively, and becomes delay signals 16a-16c, respectively. A switching circuit 41 switches the signals 16a-16c by a control signal generated by a timing pulse generation controlling circuit 42, in accordance with an arrival time of the input signal, and a delay signal 16 is is obtained. When this signal 16 is inputted to the I/Q phase discriminating circuit 6 and phase synthesis is executed between this signal and said non-delay signal 15, I and Q video outputs whose 1 period becomes 1/gamma, 1/2gamma-1/ngamma against input carrier frequency at every changeover of the switch are obtained.
JP9427581A 1981-06-17 1981-06-17 Digitizing instantaneous frequency measuring device Pending JPS57207869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9427581A JPS57207869A (en) 1981-06-17 1981-06-17 Digitizing instantaneous frequency measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9427581A JPS57207869A (en) 1981-06-17 1981-06-17 Digitizing instantaneous frequency measuring device

Publications (1)

Publication Number Publication Date
JPS57207869A true JPS57207869A (en) 1982-12-20

Family

ID=14105706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9427581A Pending JPS57207869A (en) 1981-06-17 1981-06-17 Digitizing instantaneous frequency measuring device

Country Status (1)

Country Link
JP (1) JPS57207869A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633516A (en) * 1985-05-30 1986-12-30 United States Of America As Represented By The Secretary Of The Air Force Instantaneous frequency measurement receiver with digital processing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54143274A (en) * 1978-04-28 1979-11-08 Fujitsu Ltd Frequency analyzer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54143274A (en) * 1978-04-28 1979-11-08 Fujitsu Ltd Frequency analyzer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633516A (en) * 1985-05-30 1986-12-30 United States Of America As Represented By The Secretary Of The Air Force Instantaneous frequency measurement receiver with digital processing

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