JPS55132960A - Amplitude decision circuit - Google Patents

Amplitude decision circuit

Info

Publication number
JPS55132960A
JPS55132960A JP4067979A JP4067979A JPS55132960A JP S55132960 A JPS55132960 A JP S55132960A JP 4067979 A JP4067979 A JP 4067979A JP 4067979 A JP4067979 A JP 4067979A JP S55132960 A JPS55132960 A JP S55132960A
Authority
JP
Japan
Prior art keywords
output
circuit
level
circuits
outputted
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
JP4067979A
Other languages
Japanese (ja)
Inventor
Susumu Tanaka
Moriyuki Yamamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4067979A priority Critical patent/JPS55132960A/en
Publication of JPS55132960A publication Critical patent/JPS55132960A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To prevent malfunction by producing an alarm by logic output when the input amplitude exceeds normal level in the amplitude decision of sine waves, etc.
CONSTITUTION: The input sine wave signal is supplied to DC level discriminating circuit 12, 13. When the input amplitude is larger than the maximum value decision level L1, pulses are outputted from the circuits 12 and 13. When the input amplitude is smaller than the level L1 and larger than the minimum decision level L2, a pulse is outputted from the circuit 13. When the input amplitude is smaller than L2, no pulses are outputted from the circuits 12 and 13. According to the output pulses of the circuits 12 and 13, the outputs are obtainable from change point detecting circuits 14 and 15. When the output of the circuit 14 is H or when the output of the circuit 15 is L, the output for alarming is obtainable from a logic circuit 16.
COPYRIGHT: (C)1980,JPO&Japio
JP4067979A 1979-04-04 1979-04-04 Amplitude decision circuit Pending JPS55132960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4067979A JPS55132960A (en) 1979-04-04 1979-04-04 Amplitude decision circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4067979A JPS55132960A (en) 1979-04-04 1979-04-04 Amplitude decision circuit

Publications (1)

Publication Number Publication Date
JPS55132960A true JPS55132960A (en) 1980-10-16

Family

ID=12587211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4067979A Pending JPS55132960A (en) 1979-04-04 1979-04-04 Amplitude decision circuit

Country Status (1)

Country Link
JP (1) JPS55132960A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201267A (en) * 1984-03-26 1985-10-11 Victor Co Of Japan Ltd Automatic instpecting device for signal
JPS61137076A (en) * 1984-12-07 1986-06-24 Matsushita Electric Ind Co Ltd Identification apparatus of sine-wave input level
JP2011043334A (en) * 2009-08-19 2011-03-03 Tabuchi Electric Co Ltd Ac input monitoring circuit and power supply device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201267A (en) * 1984-03-26 1985-10-11 Victor Co Of Japan Ltd Automatic instpecting device for signal
JPS61137076A (en) * 1984-12-07 1986-06-24 Matsushita Electric Ind Co Ltd Identification apparatus of sine-wave input level
JP2011043334A (en) * 2009-08-19 2011-03-03 Tabuchi Electric Co Ltd Ac input monitoring circuit and power supply device

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