描述
注意運放的輸出擺幅
任何運放都不可能是理想運放,輸出電壓都不可能達到電源電壓,一般基于MOS的運放都是軌對軌運放,在空載情況下輸出可以達到電源電壓,但是輸出都會帶一定的負載,負載越大,輸出降落越多。基于三極管的運放輸出幅度的相對值更小,有的運放輸出幅度比電源電壓要小2~6V,比如NE5532.圖4-1就是TI的TLC2272在+5V供電的輸出特性,它屬于軌對軌運放,如果用該器件作為ADC采樣的前級放大(如圖4-2),單電源+5V供電,那么當輸入接近0V的時候,輸入和輸出變得非線性的了。解決的方法是引入負電源,比如在4腳加入-1V的負電源,這樣在整個輸入范圍內(nèi),輸出與輸入都是線性的了。
主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
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順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯控制器。
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Cincinnati Milacron 3-700-0200A Power Supply
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Fanuc Opt 2 Board A16B-2202-0851 Analog I/O and H
Allen Bradley 1391-DES45-DI AC Servo Controller
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Allen Bradley 8600 Series CNC 8600-2164M Memory Module
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ABB DSQC 320 Robot Remote I/O
Atlas Copco K256871 Fastening Tool
Allen Bradley 1391-DES15-DI Digital AC Servo Controller
Fanuc A06B-6057-H004 Servo Amplifier – NEW
Fanuc A06B-6079-H301 Servo Amplifier Module
Fanuc A16B-2200-0141/?09D Base2 with Sub CPU
Sti MiniSafe MS4300 Safety Curtain Transmitter MS4356BX
Siemens 1FK7080-5AF71-1?EH0 Servo Motor – NEW
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Sti MiniSafe MS4300 Light Curtain Receiver 56″ MS4356TR
Kollmorgen/Indu?strial Drives BDS4-206J-204B2 Amplifier
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Indramat Servo Controller – HDS02.2-W040N-H?S12-01-FW
Allen Bradley AC Servo Motor 1326AB-A3G-11-A?4
Indramat MAC112C-0-ED-3-?C/130-B-1 Motor