JPS6472620A - Pulse width modulation type d/a converter - Google Patents
Pulse width modulation type d/a converterInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-09-12 JP JP22925687A patent/JPS6472620A/en active Pending
Cited By (1)
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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