JPH0346242U - - Google Patents
Info
- Publication number
- JPH0346242U JPH0346242U JP10702589U JP10702589U JPH0346242U JP H0346242 U JPH0346242 U JP H0346242U JP 10702589 U JP10702589 U JP 10702589U JP 10702589 U JP10702589 U JP 10702589U JP H0346242 U JPH0346242 U JP H0346242U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- conversion
- reference voltage
- changeover switch
- resistor
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図、第３図は、本考案に係わるＡ／Ｄ変換
装置の回路図である。第２図は従来のＡ／Ｄ変換
装置の回路図である。
１……Ａ／Ｄ変換回路、２……基準電圧発生回
路、３……抵抗Ｒ１、４……抵抗Ｒ２、５……分
圧回路、６……バイアス切り替えスイツチ、７…
…制御部、８……外部回路、９……入力端子、１
０……バイアス回路、１１……未知抵抗Ｒｘ。
1 and 3 are circuit diagrams of an A/D conversion device according to the present invention. FIG. 2 is a circuit diagram of a conventional A/D converter. DESCRIPTION OF SYMBOLS 1... A/D conversion circuit, 2... Reference voltage generation circuit, 3... Resistor R1, 4... Resistor R2, 5... Voltage dividing circuit, 6... Bias changeover switch, 7...
...Control unit, 8...External circuit, 9...Input terminal, 1
0...Bias circuit, 11...Unknown resistance Rx.
Claims (1)
Ｄ変換回路１と、Ａ／Ｄ変換回路１にＡ／Ｄ変換
基準用電圧を出力する基準電圧発生回路２と、前
記Ａ／Ｄ変換回路１のアナログ信号入力部前段に
は、抵抗Ｒ１３、抵抗Ｒ２４からなる分圧回路５
を設け、当該分圧回路５と基準電圧発生回路２は
、多段階のバイアス切り替えスイツチ６を介して
接続し、制御部７からの制御信号により、バイア
ス切り替えスイツチ６の接続を切り替えられるよ
う構成し、外部回路８から入力端子９を介して分
圧回路５の抵抗Ｒ１３に接続し、この入力端子９
に印加されるアナログ信号の電圧範囲に応じてバ
イアス切り替えスイツチ６を切り替えることによ
り、Ａ／Ｄ変換回路１の変換可能範囲外のアナロ
グ信号に対しＡ／Ｄ変換が行えるようにしたこと
を特徴とするＡ／Ｄ変換装置。 ２ 基準電圧発生回路２からのＡ／Ｄ変換基準用
電圧を、バイアス切り替えスイツチ６、分圧回路
５、入力端子９を経て外部回路８へ供給できるよ
うにした請求項１記載のＡ／Ｄ変換装置。[Claims for Utility Model Registration] 1. A/A that converts analog signals into digital quantities.
A D conversion circuit 1, a reference voltage generation circuit 2 that outputs an A/D conversion reference voltage to the A/D conversion circuit 1, and a resistor R13, a resistor Voltage dividing circuit 5 consisting of R24
The voltage dividing circuit 5 and the reference voltage generation circuit 2 are connected via a multi-stage bias changeover switch 6, and the connection of the bias changeover switch 6 can be changed by a control signal from a control section 7. , is connected to the resistor R13 of the voltage dividing circuit 5 from the external circuit 8 via the input terminal 9, and this input terminal 9
A/D conversion can be performed for analog signals outside the convertible range of the A/D conversion circuit 1 by switching the bias changeover switch 6 according to the voltage range of the analog signal applied to the A/D conversion circuit 1. A/D conversion device. 2. The A/D conversion according to claim 1, wherein the A/D conversion reference voltage from the reference voltage generation circuit 2 can be supplied to the external circuit 8 via the bias changeover switch 6, the voltage dividing circuit 5, and the input terminal 9. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10702589U JPH0346242U (en) | 1989-09-11 | 1989-09-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10702589U JPH0346242U (en) | 1989-09-11 | 1989-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0346242U true JPH0346242U (en) | 1991-04-30 |
Family
ID=31655742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10702589U Pending JPH0346242U (en) | 1989-09-11 | 1989-09-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0346242U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006234783A (en) * | 2005-01-28 | 2006-09-07 | Yazaki Corp | Device for measuring voltage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5020650A (en) * | 1973-06-21 | 1975-03-05 | ||
| JPS61123313A (en) * | 1984-11-20 | 1986-06-11 | Nec Corp | Analog-digital converting circuit |
| JPS62257219A (en) * | 1986-05-01 | 1987-11-09 | Sharp Corp | Input level setting system for analog/digital |
| JPS6359023A (en) * | 1986-08-27 | 1988-03-14 | Matsushita Electric Ind Co Ltd | A/d converter |
-
1989
- 1989-09-11 JP JP10702589U patent/JPH0346242U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5020650A (en) * | 1973-06-21 | 1975-03-05 | ||
| JPS61123313A (en) * | 1984-11-20 | 1986-06-11 | Nec Corp | Analog-digital converting circuit |
| JPS62257219A (en) * | 1986-05-01 | 1987-11-09 | Sharp Corp | Input level setting system for analog/digital |
| JPS6359023A (en) * | 1986-08-27 | 1988-03-14 | Matsushita Electric Ind Co Ltd | A/d converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006234783A (en) * | 2005-01-28 | 2006-09-07 | Yazaki Corp | Device for measuring voltage |
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