JPH0346242U - - Google Patents

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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
Application number
JP10702589U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10702589U priority Critical patent/JPH0346242U/ja
Publication of JPH0346242U publication Critical patent/JPH0346242U/ja
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

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)

【実用新案登録請求の範囲】 １ アナログ信号をデイジタル量に変換するＡ／
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.
JP10702589U 1989-09-11 1989-09-11 Pending JPH0346242U (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006234783A (en) * 2005-01-28 2006-09-07 Yazaki Corp Device for measuring voltage

Citations (4)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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