KR970072714A - Analog / digital conversion circuit - Google Patents
Analog / digital conversion circuit Download PDFInfo
- Publication number
- KR970072714A KR970072714A KR1019960012272A KR19960012272A KR970072714A KR 970072714 A KR970072714 A KR 970072714A KR 1019960012272 A KR1019960012272 A KR 1019960012272A KR 19960012272 A KR19960012272 A KR 19960012272A KR 970072714 A KR970072714 A KR 970072714A
- Authority
- KR
- South Korea
- Prior art keywords
- reference voltage
- analog
- comparison means
- scan
- microcomputer
- Prior art date
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- Analogue/Digital Conversion (AREA)
Abstract
본 발명은 아날로그/디지탈 변환회로에 관한 것으로, 종래에는 회로구성이 복잡하고 아날로그 입력포트가 없는 칩은 아날로그/디지탈 입력을 받지 못하는 단점이 있었다. 이에 따라 본 발명은, 기준전압(스캔)과 아날로그 입력신호(스캔)를 비교하는 비교수단과; 그 비교수단의 기준전압(스캔)을 분해능에 의거한 가짓수만큼 차례로 변경시키기 위해 펄스폭번조(PWM) 데이터를 일정시간씩 반복 출력함과 아울러 상기 비교수단의 출력신호가 반전되는 시점의 출력데이터를 아날로그 입력값으로 인식하는 마이컴과; 그 마이컴의 펄스폭변조 데이터신호를 콘덴서를 통해 평활시켜 상기한 비교수단의 기준전압(스캔)으로 인가하는 기준전압 발생수단으로 구성함으로써, 부품 수를 줄이고 칩의 포트 수를 줄여 구성이 간단해지고 아날로그 입력포트가 없는 칩에서도 아날로그/디지탈 변환 입력이 가능해진다.The present invention relates to an analog / digital conversion circuit, and conventionally, a circuit having a complicated circuit configuration and having no analog input port has a disadvantage in that analog / digital input is not received. Accordingly, the present invention provides an image processing apparatus comprising comparison means for comparing a reference voltage (scan) with an analog input signal (scan); (PWM) data is repeatedly output at predetermined time intervals in order to sequentially change the reference voltage (scan) of the comparison means in accordance with the resolution, and the output data at the time when the output signal of the comparison means is inverted A microcomputer for recognizing the input value as an analog input value; And a reference voltage generating means for smoothing the pulse width modulated data signal of the microcomputer through a capacitor and applying the reference voltage to the reference voltage (scan) of the comparing means. Analog / digital conversion input becomes possible even on a chip without an input port.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제4도는 본 발명에 의한 아날로그/디지탈 변환회로도.FIG. 4 is an analog / digital conversion circuit diagram according to the present invention; FIG.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960012272A KR970072714A (en) | 1996-04-22 | 1996-04-22 | Analog / digital conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960012272A KR970072714A (en) | 1996-04-22 | 1996-04-22 | Analog / digital conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR970072714A true KR970072714A (en) | 1997-11-07 |
Family
ID=66216725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960012272A KR970072714A (en) | 1996-04-22 | 1996-04-22 | Analog / digital conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970072714A (en) |
-
1996
- 1996-04-22 KR KR1019960012272A patent/KR970072714A/en not_active Application Discontinuation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19960422 |
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| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19960422 Comment text: Request for Examination of Application |
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| PG1501 | Laying open of application | ||
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 19981027 Patent event code: PE09021S01D |
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| E601 | Decision to refuse application | ||
| PE0601 | Decision on rejection of patent |
Patent event date: 19990322 Comment text: Decision to Refuse Application Patent event code: PE06012S01D Patent event date: 19981027 Comment text: Notification of reason for refusal Patent event code: PE06011S01I |