SE9500823D0 - Level Detection Circuit - Google Patents

Level Detection Circuit

Info

Publication number
SE9500823D0
SE9500823D0 SE9500823A SE9500823A SE9500823D0 SE 9500823 D0 SE9500823 D0 SE 9500823D0 SE 9500823 A SE9500823 A SE 9500823A SE 9500823 A SE9500823 A SE 9500823A SE 9500823 D0 SE9500823 D0 SE 9500823D0
Authority
SE
Sweden
Prior art keywords
signal
time
count value
average level
outputs
Prior art date
Application number
SE9500823A
Other languages
Swedish (sv)
Other versions
SE9500823L (en
Inventor
Kazushi Tsuji
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Publication of SE9500823D0 publication Critical patent/SE9500823D0/en
Publication of SE9500823L publication Critical patent/SE9500823L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof

Abstract

PURPOSE:To accurately detect an average level even when an AC signal changes with the lapse of time and output time is short. CONSTITUTION:An AC signal 1 is inputted to a detecting circuit 2, and a detecting signal 3 being an envelope component of the AC signal 1 is outputted. A V-F converter 4 outputs a pulse signal 5 which is in proportion to a level of the detecting signal 3 and has a frequency sufficiently high to a change with the lapse of time of the detecting signal 3. A counter 6 asynchronously and continuously counts the pulse signal 5, and outputs a count value 7. A count value in constant time to an average level of the AC signal is prestored in a memory 8. A logical operation part 10 takes in the count value 7 in the timing of constant time, and finds the count value per time. The logical operation part 10 also calls out data 9 of an average level of the AC signal 1 corresponding to the count value per time from the memory 8, and outputs it as an average level 11 of the AC signal in constant time.
SE9500823A 1994-03-10 1995-03-07 Level Detection Circuit SE9500823L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6039410A JPH07248340A (en) 1994-03-10 1994-03-10 Level detecting circuit

Publications (2)

Publication Number Publication Date
SE9500823D0 true SE9500823D0 (en) 1995-03-07
SE9500823L SE9500823L (en) 1995-09-11

Family

ID=12552231

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9500823A SE9500823L (en) 1994-03-10 1995-03-07 Level Detection Circuit

Country Status (3)

Country Link
JP (1) JPH07248340A (en)
AU (1) AU1474095A (en)
SE (1) SE9500823L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025705A (en) * 2012-07-24 2014-02-06 Mitsubishi Electric Corp Input signal level detector
WO2015151254A1 (en) * 2014-04-03 2015-10-08 理化工業株式会社 Ac signal measurement device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858623B2 (en) * 1973-01-25 1983-12-26 株式会社北辰電機製作所 Feedback amplifier with pulse frequency output
JPS5587958A (en) * 1978-12-26 1980-07-03 Komatsu Ltd Digital effective value meter

Also Published As

Publication number Publication date
JPH07248340A (en) 1995-09-26
AU1474095A (en) 1995-09-21
SE9500823L (en) 1995-09-11

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