JPS57104318A - Analogue-digital converting device - Google Patents
Analogue-digital converting deviceInfo
- Publication number
- JPS57104318A JPS57104318A JP18088180A JP18088180A JPS57104318A JP S57104318 A JPS57104318 A JP S57104318A JP 18088180 A JP18088180 A JP 18088180A JP 18088180 A JP18088180 A JP 18088180A JP S57104318 A JPS57104318 A JP S57104318A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- period
- voltage
- pulse
- digital
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To convert the average value of an AC voltage to a digital signal in a high speed, by using a clock pulse, which is synchronized with the AC voltage to be measured and have the 1/N period of the period of the AC voltage, as a sampling pulse. CONSTITUTION:An AC voltage li applied to an input terminal 1 is inputted to a period detecting circuit 2, and the circuit 2 generates a pulse at every one period of this voltage, and this pulse is inputted to a miltiplying circuit 3 to generate a pulse train which has the 1/N period of the period of the input pulse, and this pulse train is used as clock pulses. The AC voltage li is inputted to an A/D converting circuit 4, and the circuit 4 uses clock pulses as sampling pulses to convert the momently value to a digital signal, and a sign indicating positive and negative is ignored, and this digital signal is accumulated in a digital accumulating circuit 5. The digital accumulating circuit 5 is reset to 0 for every output of the period detecting circuit 2, and the accumulated value just before the reset is transferred to a digital dividing circuit 6 and is divided by a constant N and is outputted to an output terminal 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18088180A JPS57104318A (en) | 1980-12-19 | 1980-12-19 | Analogue-digital converting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18088180A JPS57104318A (en) | 1980-12-19 | 1980-12-19 | Analogue-digital converting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57104318A true JPS57104318A (en) | 1982-06-29 |
Family
ID=16090962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18088180A Pending JPS57104318A (en) | 1980-12-19 | 1980-12-19 | Analogue-digital converting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57104318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6354019A (en) * | 1986-08-25 | 1988-03-08 | Hitachi Ltd | A/d-d/a converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531264A (en) * | 1978-08-28 | 1980-03-05 | Iseki Agricult Mach | Grain circulation drier |
| JPS5553922A (en) * | 1978-10-17 | 1980-04-19 | Nissin Electric Co Ltd | Sampling system for analog signal formed with repetitive waveform |
-
1980
- 1980-12-19 JP JP18088180A patent/JPS57104318A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531264A (en) * | 1978-08-28 | 1980-03-05 | Iseki Agricult Mach | Grain circulation drier |
| JPS5553922A (en) * | 1978-10-17 | 1980-04-19 | Nissin Electric Co Ltd | Sampling system for analog signal formed with repetitive waveform |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6354019A (en) * | 1986-08-25 | 1988-03-08 | Hitachi Ltd | A/d-d/a converter |
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