JPS6142474U

JPS6142474U - A-D converter

Info

Publication number: JPS6142474U
Application number: JP11033285U
Authority: JP
Inventors: 健二青木
Original assignee: セイコーエプソン株式会社
Priority date: 1985-07-18
Filing date: 1985-07-18
Publication date: 1986-03-19
Also published as: JPS6236147Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図１よ、従来のＡ−Ｄ変換用集積回路の一例を示す
図。第２図は、従来のＡ−Ｄ変換用集積回路を応用した一例
を示す図。第３図は、本考案によるＡ−Ｄ変換用集積回路の実施例
を示す図。第４図は、本考案によるＡ−Ｄ変換用集樟貝路の実施例
を応用した一例を示す図。１０１・・・バツファ、１０２・・・Ａ−Ｄ変換部、１
０３、・・・ラッチ、１０４・・・オートレンジ切換信
号発生回路、１０５・・・インバータ、１０６・・・ア
カログスイッチＳエ、１０７・・・アナログスイッチＳ
２、２０１〜２０５・・・メカニカルスイッチ、２０６
・・・抵抗Ｒ、２０７・・・抵抗隅、２０８・・・抵扶
只。、２０９・・・オペアンプ、２１０・・・基準源、２１
１・・・集積回路部、２１２・・・デコーダドライバ、
２１３・・・表示、器、２１４・・・集積回路部の一部
であるアナログスイッチ、３０１・・・バツファ、３−
０２・・・Ａ−Ｄ変換部、３０３・・・ラッチ、３０４
・・・オートレンジ切換信号発生回路、３０５・・・イ
ンーく一タ、３０６・・・アナログスイッチＳ．、３０
７・・・アナログスイッチＳ２、３０８・・・ＥＸＣＬ
ＵＳＩＵＥ−ＯＲ，３Ｑ９・・・小数点ロジック
、４０１〜４０３・・・メカニカルスイッチ、４０
４−・・抵ｗ１、４０５−・・抵抗Ｒ２、４０６・
・・抵抗Ｒ３、４０７・・・オペアンプ、４０８・・・
基準源、４０９・・・Ａ−Ｄ変換用集積回路、４１０・
・・デコーダ・ドライバ、４１１・・・表示器、４１２
：・・Ａ−Ｄ変換用集積回路の一部であるアナログスイ
ッチ部、４１３・・・メカニカルスイッチ。FIG. 1 is a diagram showing an example of a conventional A-D conversion integrated circuit. FIG. 2 is a diagram showing an example in which a conventional A-D conversion integrated circuit is applied. FIG. 3 is a diagram showing an embodiment of an integrated circuit for AD conversion according to the present invention. FIG. 4 is a diagram illustrating an example of applying the embodiment of the A-to-D conversion collection method according to the present invention. 101...Buffer, 102...A-D converter, 1
03...Latch, 104...Auto range switching signal generation circuit, 105...Inverter, 106...Analog switch S, 107...Analog switch S
2, 201-205... mechanical switch, 206
...Resistance R, 207...Resistance corner, 208...Resistance only. , 209... operational amplifier, 210... reference source, 21
1... Integrated circuit section, 212... Decoder driver,
213... Display, device, 214... Analog switch which is part of the integrated circuit section, 301... Buffer, 3-
02...A-D conversion unit, 303...Latch, 304
. . . Auto range switching signal generation circuit, 305 . . . Input terminal, 306 . . . Analog switch S. , 30
7...Analog switch S2, 308...EXCL
USIUE-OR, 3 Q 9... Decimal point logic, 401-403... Mechanical switch, 4 0
4-...Resistance w1, 40 5-...Resistance R2, 406.
・Resistance R3, 407... Operational amplifier, 408...
Reference source, 409...A-D conversion integrated circuit, 410.
... Decoder driver, 411 ... Display device, 412
:...Analog switch section which is part of an integrated circuit for A-D conversion, 413...Mechanical switch.

Claims

[Claims for Utility Model Registration] An A-D converter that has the function of measuring voltage and resistance, an operational amplifier, a group of resistors corresponding to multiple ranges, an analog switch section, a reference source, an A-D conversion circuit, The operational amplifier, the tenalog switch section, the A-D conversion circuit, and the exclusive OR circuit are integrated; The mechanical switch connects the output of the operational amplifier to one end of the analog switch section when measuring voltage, connects the output of the reference source to one end of the analog switch section when measuring resistance, and connects the output of the operational amplifier to one end of the analog switch section when measuring resistance. one end is connected to the input terminal of an operational amplifier via a resistor group corresponding to the plurality of ranges, the output of the operational amplifier is input to the A-D conversion circuit, and the second mechanical switch is connected to the first power supply. A- characterized in that the second power supply is switched, and the exclusive OR circuit inputs a level signal from the second mechanical power switch to arbitrarily determine the switching order of the analog switch section. D converter.