JPS5574470A - Frequency detector - Google Patents

Frequency detector

Info

Publication number
JPS5574470A
JPS5574470A JP14826778A JP14826778A JPS5574470A JP S5574470 A JPS5574470 A JP S5574470A JP 14826778 A JP14826778 A JP 14826778A JP 14826778 A JP14826778 A JP 14826778A JP S5574470 A JPS5574470 A JP S5574470A
Authority
JP
Japan
Prior art keywords
frequency
signal
information
signals
angle information
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
JP14826778A
Other languages
Japanese (ja)
Other versions
JPS627982B2 (en
Inventor
Takashi Yamamoto
Katsutoshi Yamahashi
Yukiteru Satake
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14826778A priority Critical patent/JPS5574470A/en
Publication of JPS5574470A publication Critical patent/JPS5574470A/en
Publication of JPS627982B2 publication Critical patent/JPS627982B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE: To detect the frequency of the incoming wave instantaneously, automatically and accurately by reading out angle information from the output of an instantaneous frequency discriminator and converting the information into a frequency value.
CONSTITUTION: A high frequency signal which has received through an antenna 10 is supplied as input to an instantaneous frequency discriminator PFD12 through a limit amplifier 11 thereby to obtain four signals v1Wv4. Operational amplifiers 13, 14 and 15 operate v2-v1, v4-v3 and v3+v4, respectively, and produce signals X, Y and Z as outputs. These signals X and Y are converted into digital quantities by A/D converter circuits 16 and 17 controlled by the signal Z, and supplied to an X/Y divider circuit 18 of the subsequent stage. As a result, tangential angle information H is produced as output, and angle information θ is obtained by an inverter circuit 19. A frequency f is computed by supplying as input the information θ and a decision bit driven and produced by the signal Z to a frequency converter circuit 20.
COPYRIGHT: (C)1980,JPO&Japio
JP14826778A 1978-11-30 1978-11-30 Frequency detector Granted JPS5574470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14826778A JPS5574470A (en) 1978-11-30 1978-11-30 Frequency detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14826778A JPS5574470A (en) 1978-11-30 1978-11-30 Frequency detector

Publications (2)

Publication Number Publication Date
JPS5574470A true JPS5574470A (en) 1980-06-05
JPS627982B2 JPS627982B2 (en) 1987-02-20

Family

ID=15448940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14826778A Granted JPS5574470A (en) 1978-11-30 1978-11-30 Frequency detector

Country Status (1)

Country Link
JP (1) JPS5574470A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395346A (en) * 1965-03-24 1968-07-30 Research Corp Phase and instantaneous frequency discriminator
JPS5114072A (en) * 1974-07-24 1976-02-04 Mitsubishi Electric Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395346A (en) * 1965-03-24 1968-07-30 Research Corp Phase and instantaneous frequency discriminator
JPS5114072A (en) * 1974-07-24 1976-02-04 Mitsubishi Electric Corp

Also Published As

Publication number Publication date
JPS627982B2 (en) 1987-02-20

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