JPS5735402A - Frequency discriminating device - Google Patents

Frequency discriminating device

Info

Publication number
JPS5735402A
JPS5735402A JP11052580A JP11052580A JPS5735402A JP S5735402 A JPS5735402 A JP S5735402A JP 11052580 A JP11052580 A JP 11052580A JP 11052580 A JP11052580 A JP 11052580A JP S5735402 A JPS5735402 A JP S5735402A
Authority
JP
Japan
Prior art keywords
frequency
low
frequency mixer
pass filter
discriminating device
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
JP11052580A
Other languages
Japanese (ja)
Other versions
JPS6324346B2 (en
Inventor
Yasunori Sakaguchi
Nobuharu Yazawa
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 JP11052580A priority Critical patent/JPS5735402A/en
Priority to DE3131892A priority patent/DE3131892C2/en
Priority to US06/292,273 priority patent/US4438405A/en
Publication of JPS5735402A publication Critical patent/JPS5735402A/en
Publication of JPS6324346B2 publication Critical patent/JPS6324346B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations

Abstract

PURPOSE:To make easy the discrimination of two signals in adjacent frequencies, by comparing the adjacent frequencies after converting into low frequencies at a frequency mixer through the use of a reference signal. CONSTITUTION:An input in frequency f1 or f2 to be identified is applied to a frequency mixer 3 from an input terminal (a). A reference signal in frequency fm is applied to an input terminal (c) of the frequency mixer 3. Thus, outputs of the frequency mixer 3 are such as ¦f1+fm¦, ¦f2+fm¦, ¦f1- fm¦ and ¦f2-fm¦, and the components of ¦f1-fm¦ and ¦f2-fm¦ are only pikced up at the 1st low-pass filter 4. The output obtained here is applied to a phase comparator 2 directly and via the 2nd low-pass filter 1. The cut-off frequency fc of the 2nd low-pass filter 1 is set between ¦f1-fm¦ and ¦f2-fm¦.
JP11052580A 1980-08-12 1980-08-12 Frequency discriminating device Granted JPS5735402A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11052580A JPS5735402A (en) 1980-08-12 1980-08-12 Frequency discriminating device
DE3131892A DE3131892C2 (en) 1980-08-12 1981-08-12 Frequency separator
US06/292,273 US4438405A (en) 1980-08-12 1981-08-12 Frequency discriminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11052580A JPS5735402A (en) 1980-08-12 1980-08-12 Frequency discriminating device

Publications (2)

Publication Number Publication Date
JPS5735402A true JPS5735402A (en) 1982-02-26
JPS6324346B2 JPS6324346B2 (en) 1988-05-20

Family

ID=14538006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11052580A Granted JPS5735402A (en) 1980-08-12 1980-08-12 Frequency discriminating device

Country Status (1)

Country Link
JP (1) JPS5735402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04120420A (en) * 1990-09-12 1992-04-21 Fuji Electric Co Ltd Recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04120420A (en) * 1990-09-12 1992-04-21 Fuji Electric Co Ltd Recorder

Also Published As

Publication number Publication date
JPS6324346B2 (en) 1988-05-20

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