JPS5657962A - Frequency detector - Google Patents

Frequency detector

Info

Publication number
JPS5657962A
JPS5657962A JP13459379A JP13459379A JPS5657962A JP S5657962 A JPS5657962 A JP S5657962A JP 13459379 A JP13459379 A JP 13459379A JP 13459379 A JP13459379 A JP 13459379A JP S5657962 A JPS5657962 A JP S5657962A
Authority
JP
Japan
Prior art keywords
passes
zener diode
comparator
signal
circuit
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
JP13459379A
Other languages
Japanese (ja)
Other versions
JPS5946344B2 (en
Inventor
Terumichi Fukumoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13459379A priority Critical patent/JPS5946344B2/en
Publication of JPS5657962A publication Critical patent/JPS5657962A/en
Publication of JPS5946344B2 publication Critical patent/JPS5946344B2/en
Expired legal-status Critical Current

Links

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  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE: To enhance operation stability and frequency detecting capacity by using notch filters of sharp cut-off characteristics and an analog voltage comparator.
CONSTITUTION: The signal inputted from an IN terminal passes through notch filters 2, 3 and an amplifier 4. The notch filters 2, 3 are such that the quantity of transmission becomes 0 at f1, f2 respectively. The signal past the notch filter 2 is converted to a direct current level by a rectifying circuit 8, is led to a comparator 11, passes the 1st Zener diode circuit 17 and is converted to a logic signal level. Likewise, the signal past the notch filter 3 passes a rectifying circuit 9 and a comparator 12, and passes the 1st Zener diode circuit 18, by which it is converted to a logic signal level. The signal past a comparator 10 passes the 2nd Zener diode circuit 16 and is ANDed with the signal past the 1st Zener diode circuit 17 by an AND circuit 19.
COPYRIGHT: (C)1981,JPO&Japio
JP13459379A 1979-10-17 1979-10-17 frequency detection device Expired JPS5946344B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13459379A JPS5946344B2 (en) 1979-10-17 1979-10-17 frequency detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13459379A JPS5946344B2 (en) 1979-10-17 1979-10-17 frequency detection device

Publications (2)

Publication Number Publication Date
JPS5657962A true JPS5657962A (en) 1981-05-20
JPS5946344B2 JPS5946344B2 (en) 1984-11-12

Family

ID=15132005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13459379A Expired JPS5946344B2 (en) 1979-10-17 1979-10-17 frequency detection device

Country Status (1)

Country Link
JP (1) JPS5946344B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105353210A (en) * 2015-11-12 2016-02-24 大连理工大学 High-sensitivity large-bandwidth photon microwave measuring device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105353210A (en) * 2015-11-12 2016-02-24 大连理工大学 High-sensitivity large-bandwidth photon microwave measuring device and method

Also Published As

Publication number Publication date
JPS5946344B2 (en) 1984-11-12

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