JPS5783923A - Controller for pulse width modulation - Google Patents

Controller for pulse width modulation

Info

Publication number
JPS5783923A
JPS5783923A JP55159340A JP15934080A JPS5783923A JP S5783923 A JPS5783923 A JP S5783923A JP 55159340 A JP55159340 A JP 55159340A JP 15934080 A JP15934080 A JP 15934080A JP S5783923 A JPS5783923 A JP S5783923A
Authority
JP
Japan
Prior art keywords
frequency
signal
flop
flip
rise
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.)
Granted
Application number
JP55159340A
Other languages
Japanese (ja)
Other versions
JPH0357715B2 (en
Inventor
Osamu Miyazaki
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 JP55159340A priority Critical patent/JPS5783923A/en
Publication of JPS5783923A publication Critical patent/JPS5783923A/en
Publication of JPH0357715B2 publication Critical patent/JPH0357715B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation

Landscapes

  • Feedback Control In General (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To obtain a high-precision PWM signal by presetting a preset counter at the rise of a carrier frequency and making it count, and by resetting a flip- flop, set at the said rise, by a count end signal. CONSTITUTION:The frequency of the frequency signal 100 of an oscillating circuit 18 is divided by the 1st frequency divider 20 to obtain a signal 102, whose frequency is divided by the frequency divider 22 to generate a carrier frequency 104. The rise of the frequency 104 is detected by a differentiating circuit 24 to set a flip-flop 26, and a PWM ratio set value is preset in a counter 28. With the signal 102, the counter 28 counts down and, when its contents reach zero, generates an output, resetting the flip-flop 26.
JP55159340A 1980-11-12 1980-11-12 Controller for pulse width modulation Granted JPS5783923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55159340A JPS5783923A (en) 1980-11-12 1980-11-12 Controller for pulse width modulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55159340A JPS5783923A (en) 1980-11-12 1980-11-12 Controller for pulse width modulation

Publications (2)

Publication Number Publication Date
JPS5783923A true JPS5783923A (en) 1982-05-26
JPH0357715B2 JPH0357715B2 (en) 1991-09-03

Family

ID=15691688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55159340A Granted JPS5783923A (en) 1980-11-12 1980-11-12 Controller for pulse width modulation

Country Status (1)

Country Link
JP (1) JPS5783923A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179632U (en) * 1988-06-07 1989-12-22
JP2010273042A (en) * 2009-05-20 2010-12-02 Toyota Motor Corp Pulse density modulating and demodulating circuit and inverter controller using the modulating and demodulating circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040267A (en) * 1973-08-16 1975-04-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040267A (en) * 1973-08-16 1975-04-12

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179632U (en) * 1988-06-07 1989-12-22
JP2010273042A (en) * 2009-05-20 2010-12-02 Toyota Motor Corp Pulse density modulating and demodulating circuit and inverter controller using the modulating and demodulating circuit

Also Published As

Publication number Publication date
JPH0357715B2 (en) 1991-09-03

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