JPS57168519A - Zero cross synchronizing signal generating circuit - Google Patents

Zero cross synchronizing signal generating circuit

Info

Publication number
JPS57168519A
JPS57168519A JP56052437A JP5243781A JPS57168519A JP S57168519 A JPS57168519 A JP S57168519A JP 56052437 A JP56052437 A JP 56052437A JP 5243781 A JP5243781 A JP 5243781A JP S57168519 A JPS57168519 A JP S57168519A
Authority
JP
Japan
Prior art keywords
voltage
zero cross
circuit
supplying
phase
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
JP56052437A
Other languages
Japanese (ja)
Inventor
Tadashi Aso
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.)
Via Mechanics Ltd
Original Assignee
Hitachi Seiko 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 Hitachi Seiko Ltd filed Critical Hitachi Seiko Ltd
Priority to JP56052437A priority Critical patent/JPS57168519A/en
Publication of JPS57168519A publication Critical patent/JPS57168519A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass

Landscapes

  • Electronic Switches (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To obtain a zero cross synchronizing signal having a small shift of phase with a simple constitution of circuit, by giving the single-phase full wave rectification to the input AC voltage, supplying the rectified voltage to a filter circuit and supplying the output of the filter circuit to a voltage comparator. CONSTITUTION:A single-phase full wave rectifying circuit 2 supplies the AC voltage Vin and delivers the full wave rectified voltage VR. A BPF3 supplies the voltage VR and delivers the AC voltage Vf having a frequency twice as high as the basic frequency of the voltage Vin. This output waveform is identical with a waveform in which the zero cross point of one side is substantially coincident with that of the basic wave of the voltage Vin. Thus a zero cross period pulse signal Vout which has a rise synchronously with the zero cross point of the basic wave of the voltage Vin with about 50% duty ratio is obtained by supplying the voltage Vf to the other terminal of a voltage comparator 4 having the reference voltage of OV. As a result, a phase compensating circuit is eliminated.
JP56052437A 1981-04-09 1981-04-09 Zero cross synchronizing signal generating circuit Pending JPS57168519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56052437A JPS57168519A (en) 1981-04-09 1981-04-09 Zero cross synchronizing signal generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56052437A JPS57168519A (en) 1981-04-09 1981-04-09 Zero cross synchronizing signal generating circuit

Publications (1)

Publication Number Publication Date
JPS57168519A true JPS57168519A (en) 1982-10-16

Family

ID=12914715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56052437A Pending JPS57168519A (en) 1981-04-09 1981-04-09 Zero cross synchronizing signal generating circuit

Country Status (1)

Country Link
JP (1) JPS57168519A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100302503B1 (en) * 1992-08-04 2001-11-30 라 영 배 Duty cycle control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100302503B1 (en) * 1992-08-04 2001-11-30 라 영 배 Duty cycle control circuit

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