JPS5577235A - Signal conversion circuit - Google Patents

Signal conversion circuit

Info

Publication number
JPS5577235A
JPS5577235A JP15161478A JP15161478A JPS5577235A JP S5577235 A JPS5577235 A JP S5577235A JP 15161478 A JP15161478 A JP 15161478A JP 15161478 A JP15161478 A JP 15161478A JP S5577235 A JPS5577235 A JP S5577235A
Authority
JP
Japan
Prior art keywords
signal
alternating
circuit
outputted
current signal
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
JP15161478A
Other languages
Japanese (ja)
Inventor
Koshi Hattori
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 JP15161478A priority Critical patent/JPS5577235A/en
Publication of JPS5577235A publication Critical patent/JPS5577235A/en
Pending legal-status Critical Current

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
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • G01R19/1658—AC voltage or recurrent signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Logic Circuits (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To output a two-level logic signal with a little time delay corresponding to the envelope of an alternating-current signal by converting an intermittent alternating-current signal into a pulse signal by rectifying and then by controlling a time constant by this pulse signal. CONSTITUTION:An alternating-current signal from signal source 2 is applied to full- wave rectifier circuit 3 via contact 1 and this circuit 3 performs the full-wave rectification of the alternating-current signal and then supplies the rectified signal to waveform converter circuit 6. This converter circuit 6 compares signal 3a with preset voltage V1 close to the peak value of signal 3a and when the signal exceeds set voltage V1, pulse signal 6a is outputted. At this time, signal 6a is supplied to integrating circuit 7 and when the integral value exceeds preset voltage value V2, signal 7a of logic ''1'' is outputted. consequently, a two-level logic signal with a little time delay corresponding to the envelope of an intermittent alternating-current signal can be outputted without providing a long-time-constant circuit.
JP15161478A 1978-12-07 1978-12-07 Signal conversion circuit Pending JPS5577235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15161478A JPS5577235A (en) 1978-12-07 1978-12-07 Signal conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15161478A JPS5577235A (en) 1978-12-07 1978-12-07 Signal conversion circuit

Publications (1)

Publication Number Publication Date
JPS5577235A true JPS5577235A (en) 1980-06-10

Family

ID=15522377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15161478A Pending JPS5577235A (en) 1978-12-07 1978-12-07 Signal conversion circuit

Country Status (1)

Country Link
JP (1) JPS5577235A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286282A2 (en) * 1987-03-27 1988-10-12 Fuji Electrochemical Co.Ltd. Method for detecting input ac voltage
JPH01181219A (en) * 1988-01-12 1989-07-19 Nec Corp Reception pulse detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286282A2 (en) * 1987-03-27 1988-10-12 Fuji Electrochemical Co.Ltd. Method for detecting input ac voltage
JPH01181219A (en) * 1988-01-12 1989-07-19 Nec Corp Reception pulse detection circuit

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