JPS5694275A - Frequency detector - Google Patents

Frequency detector

Info

Publication number
JPS5694275A
JPS5694275A JP17095679A JP17095679A JPS5694275A JP S5694275 A JPS5694275 A JP S5694275A JP 17095679 A JP17095679 A JP 17095679A JP 17095679 A JP17095679 A JP 17095679A JP S5694275 A JPS5694275 A JP S5694275A
Authority
JP
Japan
Prior art keywords
output
high accuracy
frequency
voltage
oscillator
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
JP17095679A
Other languages
Japanese (ja)
Inventor
Toshihiko Hoshi
Shigeo Yamagata
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP17095679A priority Critical patent/JPS5694275A/en
Publication of JPS5694275A publication Critical patent/JPS5694275A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform detection of high accuracy with simple constitution by multiplying the oscillator output of high accuracy and the voltage to be measured, and inputting the output thereof to a frequency/voltage converter via a filter.
CONSTITUTION: The output of an oscillator 1 of high accuracy to become a reference, for example, a crystal oscillator, and the voltage 2 to be measured are multiplied by a multiplier 3. The output of the multiplier 3 is applied via a filter 4 which permits the passage of the frequency difference of both, to a frequency/voltage converter 5, by which the frequency difference is converted to an analog signal, and the result thereof is obtained in an output 6.
COPYRIGHT: (C)1981,JPO&Japio
JP17095679A 1979-12-28 1979-12-28 Frequency detector Pending JPS5694275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17095679A JPS5694275A (en) 1979-12-28 1979-12-28 Frequency detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17095679A JPS5694275A (en) 1979-12-28 1979-12-28 Frequency detector

Publications (1)

Publication Number Publication Date
JPS5694275A true JPS5694275A (en) 1981-07-30

Family

ID=15914488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17095679A Pending JPS5694275A (en) 1979-12-28 1979-12-28 Frequency detector

Country Status (1)

Country Link
JP (1) JPS5694275A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04285864A (en) * 1991-03-14 1992-10-09 Nec Corp Frequency measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04285864A (en) * 1991-03-14 1992-10-09 Nec Corp Frequency measuring apparatus

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