JPS5725157A - Triangular wave comparing circuit - Google Patents

Triangular wave comparing circuit

Info

Publication number
JPS5725157A
JPS5725157A JP9746080A JP9746080A JPS5725157A JP S5725157 A JPS5725157 A JP S5725157A JP 9746080 A JP9746080 A JP 9746080A JP 9746080 A JP9746080 A JP 9746080A JP S5725157 A JPS5725157 A JP S5725157A
Authority
JP
Japan
Prior art keywords
triangular wave
output
voltage
wave signal
comparator
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
JP9746080A
Other languages
Japanese (ja)
Inventor
Yoshitoku Kozai
Katsuo Kobari
Keiji Sakamoto
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP9746080A priority Critical patent/JPS5725157A/en
Publication of JPS5725157A publication Critical patent/JPS5725157A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To prevent the damage of a semiconductor element controlled by a triangular wave comparing circuit output by inhibiting the output for a short period in the vicinity of the positive and negative peaks of the triangular wave. CONSTITUTION:This comparing circuit has a triangular wave signal generator 37, a comparator 33 of an input signal Vin with a triangular wave signal, a comparator 34 of the voltage of one terminal of a low voltage diodes ZD1-4 connected between the diagonal points of a triangular wave signal amplitude determining diode bridge circuit 36, and a comparator 35 having an output terminal connected commonly to the output terminals of the comarator 33, 34 for comparing the voltage of the other terminal of the constant voltage diodes ZD1-4 with the voltage of the adding point 31 of a rectangular wave. The output signals of the comparators 33-35 are inhibited during the predetermined period of time before and after the triangular wave signal Vin passes the positive and negative peaks.
JP9746080A 1980-07-18 1980-07-18 Triangular wave comparing circuit Pending JPS5725157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9746080A JPS5725157A (en) 1980-07-18 1980-07-18 Triangular wave comparing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9746080A JPS5725157A (en) 1980-07-18 1980-07-18 Triangular wave comparing circuit

Publications (1)

Publication Number Publication Date
JPS5725157A true JPS5725157A (en) 1982-02-09

Family

ID=14192905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9746080A Pending JPS5725157A (en) 1980-07-18 1980-07-18 Triangular wave comparing circuit

Country Status (1)

Country Link
JP (1) JPS5725157A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5410653A (en) * 1977-06-24 1979-01-26 Matsushita Electric Ind Co Ltd Pwm modulation system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5410653A (en) * 1977-06-24 1979-01-26 Matsushita Electric Ind Co Ltd Pwm modulation system

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