JPS6437124A - Pulse width modulating signal generator - Google Patents

Pulse width modulating signal generator

Info

Publication number
JPS6437124A
JPS6437124A JP19257087A JP19257087A JPS6437124A JP S6437124 A JPS6437124 A JP S6437124A JP 19257087 A JP19257087 A JP 19257087A JP 19257087 A JP19257087 A JP 19257087A JP S6437124 A JPS6437124 A JP S6437124A
Authority
JP
Japan
Prior art keywords
counter
pwm signal
resolution
counted
pwm
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
JP19257087A
Other languages
Japanese (ja)
Other versions
JP2674648B2 (en
Inventor
Kenji Kubo
Masahiko Watanabe
Tsutomu Omae
Hiroyuki Hanei
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP62192570A priority Critical patent/JP2674648B2/en
Publication of JPS6437124A publication Critical patent/JPS6437124A/en
Application granted granted Critical
Publication of JP2674648B2 publication Critical patent/JP2674648B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To generate a PWM signal of high resolution without using a high frequency clock neither a long bit length counter by subjecting the resolution of a PWM signal generating means of low resolution to pulse width modulation furthermore in the period of PWM command data generation. CONSTITUTION:The clock pulse from a clock pulse generator 1 is counted by a counter 2, and the counted value of the counter 2 and PWM command data D1 are compared with each other by a digital comparator 3. Output pulses of the counter 2 are counted by a counter 4, and the counted value of the counter 4 and PWM command data D2 are compared with each other by a digital comparator 5. Outputs of these digital comparators 3 and 5 are processed by a NOR gate 7 and a D type flip flop 6, and a PWM signal where the resolution of the PWM signal outputted from the digital comparator 3 is enhanced is outputted.
JP62192570A 1987-08-03 1987-08-03 Pulse width modulation signal generator Expired - Lifetime JP2674648B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62192570A JP2674648B2 (en) 1987-08-03 1987-08-03 Pulse width modulation signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62192570A JP2674648B2 (en) 1987-08-03 1987-08-03 Pulse width modulation signal generator

Publications (2)

Publication Number Publication Date
JPS6437124A true JPS6437124A (en) 1989-02-07
JP2674648B2 JP2674648B2 (en) 1997-11-12

Family

ID=16293478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62192570A Expired - Lifetime JP2674648B2 (en) 1987-08-03 1987-08-03 Pulse width modulation signal generator

Country Status (1)

Country Link
JP (1) JP2674648B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0493167A (en) * 1990-08-09 1992-03-25 Jason Inc Adhesive and soft polishing tool and manufacture thereof
US6310913B1 (en) 1996-05-20 2001-10-30 Asahi Kasei Kabushiki Kaisha Circuit and method for modulating pulse width
US6985986B2 (en) * 2001-06-01 2006-01-10 Microchip Technology Incorporated Variable cycle interrupt disabling

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155833A (en) * 1981-03-23 1982-09-27 Toshiba Corp Digital-to-analog converting circuit
JPS58130619A (en) * 1982-01-29 1983-08-04 Toshiba Corp Digital-analog converter
JPS5911026A (en) * 1982-07-12 1984-01-20 Yokogawa Hokushin Electric Corp Digital-analog converter
JPS61256826A (en) * 1985-05-09 1986-11-14 Sony Corp Digital-analog converter
JPS6242620A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Pwm type d/a converting circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155833A (en) * 1981-03-23 1982-09-27 Toshiba Corp Digital-to-analog converting circuit
JPS58130619A (en) * 1982-01-29 1983-08-04 Toshiba Corp Digital-analog converter
JPS5911026A (en) * 1982-07-12 1984-01-20 Yokogawa Hokushin Electric Corp Digital-analog converter
JPS61256826A (en) * 1985-05-09 1986-11-14 Sony Corp Digital-analog converter
JPS6242620A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Pwm type d/a converting circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0493167A (en) * 1990-08-09 1992-03-25 Jason Inc Adhesive and soft polishing tool and manufacture thereof
US6310913B1 (en) 1996-05-20 2001-10-30 Asahi Kasei Kabushiki Kaisha Circuit and method for modulating pulse width
US6985986B2 (en) * 2001-06-01 2006-01-10 Microchip Technology Incorporated Variable cycle interrupt disabling

Also Published As

Publication number Publication date
JP2674648B2 (en) 1997-11-12

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