JPS6472620A - Pulse width modulation type d/a converter - Google Patents

Pulse width modulation type d/a converter

Info

Publication number
JPS6472620A
JPS6472620A JP22925687A JP22925687A JPS6472620A JP S6472620 A JPS6472620 A JP S6472620A JP 22925687 A JP22925687 A JP 22925687A JP 22925687 A JP22925687 A JP 22925687A JP S6472620 A JPS6472620 A JP S6472620A
Authority
JP
Japan
Prior art keywords
signal
bipolar
voltage
pulse
duty ratio
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
JP22925687A
Other languages
Japanese (ja)
Inventor
Koichi Yakura
Hiroaki Iio
Kenji Imura
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.)
Minolta Co Ltd
Original Assignee
Minolta Co 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP22925687A priority Critical patent/JPS6472620A/en
Publication of JPS6472620A publication Critical patent/JPS6472620A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To convert a bipolar digital input signal into a bipolar analog signal, by smoothing a voltage pulse outputted from a 2nd switch inverting the voltage of a capacitor when a bipolar signal is negative so as to output an analog signal corresponding to the duty ratio of the voltage pulse. CONSTITUTION:A CPU 1 receives a digital input signal (e) and outputs a bipolar signal (a) representing the polarity of the digital input signal (e) and a pulse signal (b) having a duty ratio corresponding to the absolute value of the digital input signal (e) to the pulse voltage conversion means 2, which outputs a positive pulse voltage having a duty ratio when the bipolar signal (a) is positive and outputs a negative pulse voltage having a duty ratio when the bipolary signal (b) is negative. Then the pulse voltage is inputted to a low pass filter 3 to obtain a bipolar analog voltage corresponding to the duty ratio. Thus, the bipolar digital signal is converted into the bipolar analog signal.
JP22925687A 1987-09-12 1987-09-12 Pulse width modulation type d/a converter Pending JPS6472620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22925687A JPS6472620A (en) 1987-09-12 1987-09-12 Pulse width modulation type d/a converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22925687A JPS6472620A (en) 1987-09-12 1987-09-12 Pulse width modulation type d/a converter

Publications (1)

Publication Number Publication Date
JPS6472620A true JPS6472620A (en) 1989-03-17

Family

ID=16889260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22925687A Pending JPS6472620A (en) 1987-09-12 1987-09-12 Pulse width modulation type d/a converter

Country Status (1)

Country Link
JP (1) JPS6472620A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2818626B2 (en) * 1995-02-14 1998-10-30 ミツビシ キャタピラー フォークリフト アメリカ インク Decoded signal containing encoded information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2818626B2 (en) * 1995-02-14 1998-10-30 ミツビシ キャタピラー フォークリフト アメリカ インク Decoded signal containing encoded information

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