JPH0476774U - - Google Patents
Info
- Publication number
- JPH0476774U JPH0476774U JP12140990U JP12140990U JPH0476774U JP H0476774 U JPH0476774 U JP H0476774U JP 12140990 U JP12140990 U JP 12140990U JP 12140990 U JP12140990 U JP 12140990U JP H0476774 U JPH0476774 U JP H0476774U
- Authority
- JP
- Japan
- Prior art keywords
- voltage signal
- analog voltage
- converter
- converted
- image sensor
- 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
- 238000005070 sampling Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Facsimile Image Signal Circuits (AREA)
- Facsimile Heads (AREA)
Description
第１図は、この考案の一実施例による信号処理
回路図、第２図は従来の信号処理回路図、第３図
は従来のサンプルホールド回路図、第４図は従来
のピークホールド回路図である。
図において、１はセンサ本体、２はサンプルホ
ールド回路、３はバツフア、４はピークホールド
回路、５はＡ／Ｄコンバータ、６はデイジタル画
信号出力、７はＡ／Ｄコンバータ、８はラツチ、
９はＤ／Ａコンバータを示す。なお、図中、同一
符号は同一、または相当部分を示す。
Figure 1 is a signal processing circuit diagram according to an embodiment of this invention, Figure 2 is a conventional signal processing circuit diagram, Figure 3 is a conventional sample hold circuit diagram, and Figure 4 is a conventional peak hold circuit diagram. be. In the figure, 1 is the sensor body, 2 is a sample hold circuit, 3 is a buffer, 4 is a peak hold circuit, 5 is an A/D converter, 6 is a digital image signal output, 7 is an A/D converter, 8 is a latch,
9 indicates a D/A converter. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
、アナログ電圧信号を得るセンサ素子、当該セン
サ素子により得られたアナログ電圧信号をデイジ
タル変換するＡ／Ｄコンバータ、当該Ａ／Ｄコン
バータの基準電圧を上記アナログ電圧信号の一部
より作り出す機能を有する回路を含むイメージセ
ンサにおいて、上記アナログ電圧信号の一部をサ
ンプリングした電圧をいつたんＡ／Ｄ変換しラツ
チ（保持）した後、Ｄ／Ａ変換して得られた電圧
を上記基準電圧として用いることを特徴とするイ
メージセンサ。 A sensor element that photoelectrically converts one-dimensional or two-dimensional visual information to obtain an analog voltage signal, an A/D converter that digitally converts the analog voltage signal obtained by the sensor element, and a reference voltage of the A/D converter as described above. In an image sensor that includes a circuit that has a function of generating a part of an analog voltage signal, a voltage obtained by sampling a part of the analog voltage signal is first A/D converted and latched (held), and then D/A converted. An image sensor characterized in that the obtained voltage is used as the reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12140990U JPH0476774U (en) | 1990-11-19 | 1990-11-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12140990U JPH0476774U (en) | 1990-11-19 | 1990-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0476774U true JPH0476774U (en) | 1992-07-03 |
Family
ID=31869266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12140990U Pending JPH0476774U (en) | 1990-11-19 | 1990-11-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0476774U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS64865A (en) * | 1987-06-23 | 1989-01-05 | Fujitsu Ltd | Picture signal correcting circuit |
| JPH0140966B2 (en) * | 1982-01-12 | 1989-09-01 | Seiko Denshi Kogyo Kk |
-
1990
- 1990-11-19 JP JP12140990U patent/JPH0476774U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0140966B2 (en) * | 1982-01-12 | 1989-09-01 | Seiko Denshi Kogyo Kk | |
| JPS64865A (en) * | 1987-06-23 | 1989-01-05 | Fujitsu Ltd | Picture signal correcting circuit |