供应:无限制件
关键词:VT11017-1X/ 放大器 力士乐
联系咨询
力士乐VT11017-1X/放大器 力士乐VT11017-1X/放大器 产品简介： 放大器是能把输入讯号的电压或功率放大的装置，由电子管或晶体管、电源变压器和其他电器元件组成。用在通讯、广播、雷达、电视、自动控制等各种装置中。 力士乐液压部分系列型号： R902496368 ALA10VO45DFR1/52R-VSC11N00-S3571 R902536807 ALA10VO45DFR1/52R-VSC11N00-S4330 R902544067 ALA10VO45DFR1/52R-VSC12K01 R902451239 ALA10VO45DFR1/52R-VSC12K04 R910999101 ALA10VO45DFR1/52R-VSC12K52-S1022 R902411732 ALA10VO45DFR1/52R-VSC12K52-S1237 R986110497 ALA10VO45DFR1/52R-VSC12K52-S1237 R992001296 ALA10VO45DFR1/52R-VSC12K52-S1237 R902485232 ALA10VO45DFR1/52R-VSC12K52-S4100 R902411924 ALA10VO45DFR1/52R-VSC12K68-S1652 R986110488 ALA10VO45DFR1/52R-VSC12K68-S1652 R992001298 ALA10VO45DFR1/52R-VSC12K68-S1652 R902484138 ALA10VO45DFR1/52R-VSC12N00 R902410370 ALA10VO45DFR1/52R-VSC12N00-S1190 R902436558 ALA10VO45DFR1/52R-VSC12N00-S1388 R902504498 ALA10VO45DFR1/52R-VSC12N00-S3880 R902538636 ALA10VO45DFR1/52R-VSC12N00-S4399 R902405399 ALA10VO45DFR1/52R-VSC12N00-SO547 R902536581 ALA10VO45DFR1/52R-VSC12N00-S4327 R902449609 ALA10VO45DFR1/52R-VSC62N00 R902454139 ALA10VO45DFR1/52R-VSC64N00-S2053 R992000855 ALA10VO45DFR1/52R-VSC64N00-S2053 R902517370 ALA10VO45DFR1/52R-VSC73N00-S4047 R902451014 ALA10VO45DFR1/52R-VUC11N00-S1631 R902535363 ALA10VO45DFR1/52R-VUC11N00-S4296 R902400379 ALA10VO45DFR1/52R-VUC11N00-SO794 R902500023 ALA10VO45DFR1/52R-VUC12N00-S1089 R902501221 ALA10VO45DFR1/52R-VUC12N00-S1950 R902551053 ALA10VO45DFR1/52R-VUC12N00-S4829 R902548668 ALA10VO45DFR1/52R-VUC61N00 R902453414 ALA10VO45DFR1/52R-VUC64N00-S1137 R902560522 ALA10VO45DFR1/52R-VUC64N00-S5169 R902403397 ALA10VO45DFR1/52W-PSC11N00-S1157 R902429356 ALA10VO45DFR1/52W-PUC11N00*UNGUEL*** R992000746 ALA10VO45DFR1/52W-PUC45N00-SO724 R902429752 ALA10VO45DFR1/52W-PUC45N00-SO724 R902430730 ALA10VO45DFR1/52WX-VSC95N000-SO481 R902420773 ALA10VO45DFR1/52WX-VSC95N000-SO481 R992000716 ALA10VO45DFR1/52WX-VSC95N000-SO481 R986110662 ALA10VO45DFR1/52WX-VSC95N000-SO481 R902404998 ALA10VO45DR/52L-PSC62K01 R902449786 ALA10VO45DR/52L-PSC62N00 R992000835 ALA10VO45DR/52L-PSC62N00 R902400191 ALA10VO45DR/52L-VSC11N00-SO794 R902505430 ALA10VO45DR/52L-VSC12N00-S4437 R902426841 ALA10VO45DR/52L-VSC61N00 R902514908 ALA10VO45DR/52L-VUC11N00-S2681 R902545804 ALA10VO45DR/52L-VUC12N00 R902405852 ALA10VO45DR/52R-PSC12K02 R902425313 ALA10VO45DR/52R-PSC62K01 R992000732 ALA10VO45DR/52R-PSC62K01 R902407463 ALA10VO45DR/52R-PSC62K02 R910984501 ALA10VO45DR/52R-PSC62N00 R992001054 ALA10VO45DR/52R-PSC62N00 R910985928 ALA10VO45DR/52R-PSC62N00-SO710 R902401323 ALA10VO45DR/52R-PSC64N00 R902438322 ALA10VO45DR/52R-PUC62K68 R902438653 ALA10VO45DR/52R-PUC62K68E R902462905 ALA10VO45DR/52R-VCC57H00-S2059 R902505794 ALA10VO45DR/52R-VCC57H00-S2059 R902502750 ALA10VO45DR/52R-VCC57K52-S2059 R902452042 ALA10VO45DR/52R-VCC62H00-S2059 R902465511 ALA10VO45DR/52R-VRC62K68-S1530 R902554671 ALA10VO45DR/52R-VSC12K68-SO97 R902520730 ALA10VO45DR/52R-VSC62K01 R902400440 ALA10VO45DR/52R-VSC62N00 R902400302 ALA10VO45DR/52R-VSC62N00-SO710 R986110070 ALA10VO45DR/52R-VUC12N00-S1124 R902400160 ALA10VO45DR/52R-VUC12N00-S1124 R902436641 ALA10VO45DR/52W-PUC45N000-S1863 R902531413 ALA10VO45DR/52W-VUC45N000-S4128 R902531414 ALA10VO45DR/52W-VUC45N000-S4130 R902483831 ALA10VO45DR/52L-VWC11N00 R902502569 ALA10VO45DR/52R-VCC57H00-S2059 R902505871 ALA10VO45DR/52R-VCC62K68-SO97 R902452035 ALA10VO45DR1/52R-VCC62H00-S2059 R902481091 ALA10VO45DRF/53L-VSC11N00 R910974999 ALA10VO45DRG/52L-PSC12N00-SO547 R902434906 ALA10VO45DRG/52L-PSC12N00-SO702 R902436896 ALA10VO45DRG/52L-PUC12N00 R902409926 ALA10VO45DRG/52L-VSC11N00-S1171 R986110041 ALA10VO45DRG/52L-VSC11N00-SO794 R902400381 ALA10VO45DRG/52L-VSC11N00-SO794 R902518695 ALA10VO45DRG/52L-VSC12K68 R902533807 ALA10VO45DRG/52L-VUC11N00 R986110049 ALA10VO45DRG/52L-VUC11N00-S1407 R902400036 ALA10VO45DRG/52L-VUC11N00-S1407 R986110036 ALA10VO45DRG/52L-VUC11N00-S1408 R902400037 ALA10VO45DRG/52L-VUC11N00-S1408 R986110043 ALA10VO45DRG/52L-VUC11N00-S1528 R902423977 ALA10VO45DRG/52L-VUC11N00-S1528 R902477645 ALA10VO45DRG/52L-VUC12K01 R902406087 ALA10VO45DRG/52R-PSC62N00-S1859 R902413903 ALA10VO45DRG/52R-PUC11N00-S1038 R902420468 ALA10VO45DRG/52R-PUC11N00-S1427 R902436919 ALA10VO45DRG/52R-PUC12N00 R902539503 ALA10VO45DRG/52R-VSC12N00 R902411661 ALA10VO45DRG/52R-VUC11N00-S1171 R902418092 ALA10VO45DRG/52R-VUC11N00-S1380 R902476647 ALA10VO45DRG/52R-VUC12K01 R902402409 ALA10VO45DRG/52R-VUC12N00-S1127 R902484829 ALA10VO45DRS/53L-VSC12H00 R902459289 ALA10VO45DRS/53L-VSC12K04 R992000877 ALA10VO45DRS/53L-VSC12K04 R902511397 ALA10VO45DRS/53R-VRC12K68 R902520796 ALA10VO45DRS/53R-VSC12N00 R902518504 ALA10VO45DRS/53L-VSC12G20 R902459268 ALA10VO45DRS/53L-VSC12K01 R902503936 ALA10VO45DRSC/52R-PSC12N00-S1518 R902468626 ALA10VO45ED72/53L-VUC12N00P R902520582 ALA10VO45EP2D/53R-VSC12K01P-SO928 R902476899 ALA10VO45ED71/52R-VSC11N00P-S2110 R902559695 ALA10VO45ED71/52R-VSC11N00P-S2110 R902504348 ALA10VO45ED71/52L-VSC11N00P-S4135 R992001001 ALA10VO45ED71/52L-VSC11N00T-S3457 R902502782 ALA10VO45ED71/52L-VSC11N00T-S3457 R902505400 ALA10VO45ED71/52L-VSC11N00T-S4135 R902506141 ALA10VO45ED71/52L-VSC11N00T-S4852 R902401437 ALA10VO45ED71/52L-VUC11N00T R902467313 ALA10VO45ED71/52L-VUC11N00T R992000910 ALA10VO45ED71/52L-VUC11N00T R902450293 ALA10VO45ED71/52L-VWC12K68P R902505772 ALA10VO45ED71/52R-VSC61N00P*FNI* R902406105 ALA10VO45ED71/52R-VUC11N00T R992000673 ALA10VO45ED71/52R-VUC11N00T R986110551 ALA10VO45ED71/52R-VUC11N00T R986120033 ALA10VO45ED71/52R-VUC11N00TREMAN R902418243 ALA10VO45ED71/52R-VUC12N00T R902472747 ALA10VO45ED72/52R-VSC11N00-S2697 R902559696 ALA10VO45ED72/52R-VSC11N00-S2697 R902477534 ALA10VO45ED72/52R-VWC12N00P-S2110 R902521014 ALA10VO45ED72/52L-PRC12K04P-S4223 R902521004 ALA10VO45ED72/52L-PRC12K04PESO854 R902443439 ALA10VO45ED72/52L-PSC12N00-S1514 R902409904 ALA10VO45ED72/52L-PSC62K01T-SO97 R992000684 ALA10VO45ED72/52L-PSC62K01T-SO97 R902421540 ALA10VO45ED72/52L-VCA11N00-S1409 R902559691 ALA10VO45ED72/52L-VCA11N00-S1409 R902460867 ALA10VO45ED72/52L-VRC12K68H R902443196 ALA10VO45ED72/52L-VRC12K68P R902494544 ALA10VO45ED72/52L-VSC12K01P R902540443 ALA10VO45ED72/52L-VSC12K01P R902549019 ALA10VO45ED72/52L-VSC12K68P-S4078 R902481206 ALA10VO45ED72/52L-VSC12N00P-SO481 R902428344 ALA10VO45ED72/52L-VSC12N00P-SO702 R902413775 ALA10VO45ED72/52L-VSC12N00T R902412963 ALA10VO45ED72/52L-VSC12N00T-S1458 R902474960 ALA10VO45ED72/52L-VSC62K01T R902541850 ALA10VO45ED72/52L-VSC62K01T-SO97 R902541851 ALA10VO45ED72/52L-VSC62K01T-SO97 R902485267 ALA10VO45ED72/52L-VUC12K01P R902419049 ALA10VO45ED72/52L-VUC12K01T R902490856 ALA10VO45ED72/52L-VUC12N00H-SO794 R902519468 ALA10VO45ED72/52L-VUC12N00P-SO794 R902487606 ALA10VO45ED72/52L-VUC12N00T R902534780 ALA10VO45ED72/52L-VWC12K68P R902547090 ALA10VO45ED72/52L-VWC12N00P-SO481 R902433250 ALA10VO45ED72/52R-PSC12N00-S1514 R902425316 ALA10VO45ED72/52R-PSC62K04T-SO607 R902418921 ALA10VO45ED72/52R-VCA11N00-S1619 R902559690 ALA10VO45ED72/52R-VCA11N00-S1619 R902496729 ALA10VO45ED72/52R-VRC12N00P-S2062 R902519413 ALA10VO45ED72/52R-VSC11N00P R902493788 ALA10VO45ED72/52R-VSC11N00P-S3456 R902537874 ALA10VO45ED72/52R-VSC11N00P-SO481 R902520677 ALA10VO45ED72/52R-VSC12G60P R902416248 ALA10VO45ED72/52R-VSC12K01T R902488510 ALA10VO45ED72/52R-VSC12K68H-S3277 R902449454 ALA10VO45ED72/52R-VSC12K68P-S2381 R986110509 ALA10VO45ED72/52R-VSC12K68P-S2381 R902486270 ALA10VO45ED72/52R-VSC12K68P-S3164 R902535359 ALA10VO45ED72/52R-VSC12K68P-S3456 R902449900 ALA10VO45ED72/52R-VSC12N00-SO413 R902436185 ALA10VO45ED72/52R-VSC12N00T-SO702 R902450247 ALA10VO45ED72/52R-VSC62G54-S2088 R902456001 ALA10VO45ED72/52R-VSC62G54T-SO97 R902473045 ALA10VO45ED72/52R-VSC62K01T-SO97 R902556996 ALA10VO45ED72/52R-VUC11N00P-S5029 R902490855 ALA10VO45ED72/52R-VUC12N00H-SO794 R902519474 ALA10VO45ED72/52R-VUC12N00P R902487607 ALA10VO45ED72/52R-VUC12N00T R902482315 ALA10VO45ED72/52R-VWC12N00P R902554506 ALA10VO45ED72/53L-VWC11N00P R902554504 ALA10VO45ED72/53L-VWC11N00P R902545285 ALA10VO45ED72/53R-VWC12N00P-S3456 R902427212 ALA10VO45ED73/52L-VSC12N00T R902510857 ALA10VO45ED74/52L-VSC12K68P-S3680 R902514513 ALA10VO45ED74/52L-VUC11N00P-S3839 R902536065 ALA10VO45ED74/52L-VUC11N00P-S4312 R902531531 ALA10VO45EK2ED/53R-VRC11N00P R902547877 ALA10VO45EP1D/53L-VSC12K01P R902551274 ALA10VO45EP1DS/53R-VSC12N00P-S2482 R902548023 ALA10VO45EP2D/53L-VRC12L50P R902521217 ALA10VO45EP2D/53R-VSC12K04P-SO928 R902520692 ALA10VO45EP2D/53R-VSC12K68P-SO928 R902493790 ALA10VO45EP2D/53L-VUC12G30P-SO928 R902520708 ALA10VO45EP2ED/53R-VSC12N00P-SO928 R902549288 ALA10VO45EP2ER/53R-VSC12N00P R902540888 ALA10VO45ER71/52R-VSC11N00P-SO97 R902518506 ALA10VO45ER72/52L-VSC12G70P R902544410 ALA10VO45LA6DS/53R-VSC12K68 R902551393 ALA10VO45LA7DS/53R-VSC12N00-S2482 R902445777 ALA10VO45LA8DS/53R-VSC12H00'BASIC' R902547477 ALA10VO45LA8DS/53R-VSC12N00 R902453753 ALA10VO45LA8DS/53R-VSC12N00-S2111 R902449853 ALA10VO45LA8DS/53R-VSC12N00'BASIC'*G R902502504 ALA10VO45LA8DS/53R-VUC62N00-S3042 R902471099 ALA10VO45LA9DS/53R-VSC12N00 R902547544 ALA10VO45LA9DS/53R-VSC12N00-SO928 R902456008 ALA10VO45LA9DS/53R-VUC62H00-SO928 R902449383 ALA10VO45LA9DS/53R-VUC62H00'BASIC' R902455244 ALA10VO45LA9DS/53R-VUC62N00-SO928 R902428100 ALA10VO60DFLR/52R-VQC12N00*UNGUEL*** R902408295 ALA10VO60DFR/52L-PSC62N00-SO547 R902406935 ALA10VO60DFR/52L-PSC62N00-SO834 R902401287 ALA10VO60DFR/52L-PSD62N00 R910999949 ALA10VO60DFR/52L-PSD62N00-SO736 R902400180 ALA10VO60DFR/52L-PUC62N00 R902530887 ALA10VO60DFR/52L-VRC12K68-S4097 R902511228 ALA10VO60DFR/52L-VSC12N00-SO834 R902454251 ALA10VO60DFR/52L-VUC12N00 R902488379 ALA10VO60DFR/52L-VWC12N00 R902537781 ALA10VO60DFR/52L-VWC12N00 R902446608 ALA10VO60DFR/52R-PCD11N00-S1814 R910990158 ALA10VO60DFR/52R-PSD61N00 R910985184 ALA10VO60DFR/52R-PSD61N00 R902403174 ALA10VO60DFR/52R-PSD61N00-SO547 R902430765 ALA10VO60DFR/52R-PSD62K02-SO200 R902402705 ALA10VO60DFR/52R-PSD62K15 R902403165 ALA10VO60DFR/52R-PSD62K15-SO547 R902408291 ALA10VO60DFR/52R-PSD62N00-SO547 R910985337 ALA10VO60DFR/52R-PUC61N00 R910985880 ALA10VO60DFR/52R-PWC61N00-SO751 R902535967 ALA10VO60DFR/52R-VSC12K68-S4096 R902511078 ALA10VO60DFR/52R-VSC12N00-SO834 R902550295 ALA10VO60DFR/52R-VSD12K15-SO834 R902544016 ALA10VO60DFR/52R-VSD12N00 R902543711 ALA10VO60DFR/52R-VSD12N00 R902435969 ALA10VO60DFR/52R-VUC11N00-SO547 R902468743 ALA10VO60DFR/52R-VUC12N00 R902455349 ALA10VO60DFR1/5*UNGUEL***0-S1865 R902455352 ALA10VO60DFR1/52*UNGUEL***-S1865 R910985120 ALA10VO60DFR1/52L-PKD62N00-SO52 R902433658 ALA10VO60DFR1/52L-PQC11N00 R902415960 ALA10VO60DFR1/52L-PSD11N00-SO705 R902420845 ALA10VO60DFR1/52L-PSD12K01 R902433289 ALA10VO60DFR1/52L-PSD12K01-SO547 R992000764 ALA10VO60DFR1/52L-PSD12K01-SO547 R902420808 ALA10VO60DFR1/52L-PSD12K15 R902433286 ALA10VO60DFR1/52L-PSD12K15-SO547 R902450037 ALA10VO60DFR1/52L-PSD12K68-SO547 R992000838 ALA10VO60DFR1/52L-PSD12K68-SO547 R902410007 ALA10VO60DFR1/52L-PSD12N00-SO702 R902408342 ALA10VO60DFR1/52L-PSD61N00-SO547 R910989513 ALA10VO60DFR1/52L-PSD62N00 R902410326 ALA10VO60DFR1/52L-PSD62N00-S1183 R902401493 ALA10VO60DFR1/52L-PSD62N00-S1800 R902402901 ALA10VO60DFR1/52L-PSD62N00-SO736 R902400470 ALA10VO60DFR1/52L-PSD62N00-SO834 R910998946 ALA10VO60DFR1/52L-PUC11N00 R902444039 ALA10VO60DFR1/52L-PUC11N00-S1669 R992000800 ALA10VO60DFR1/52L-PUC11N00-S1669 R902432680 ALA10VO60DFR1/52L-PUC11N00-S1683 R992000762 ALA10VO60DFR1/52L-PUC11N00-S1683 R902432386 ALA10VO60DFR1/52L-PUC11N00-S1763 R902431161 ALA10VO60DFR1/52L-PUC11N00-SO547 R902436861 ALA10VO60DFR1/52L-PUC62N00-SO547 R910999130 ALA10VO60DFR1/52L-PWC12K52-S1022 R902407137 ALA10VO60DFR1/52L-PWC12K68-SO973 R902504230 ALA10VO60DFR1/52L-VKD62N00-S3578 R902515718 ALA10VO60DFR1/52L-VQC11N00-S3897 R902479396 ALA10VO60DFR1/52L-VQC12N00 R902418619 ALA10VO60DFR1/52L-VRC11N00-S1411 R902406788 ALA10VO60DFR1/52L-VRD12K68-S2090 R902453560 ALA10VO60DFR1/52L-VSC12K04 R902462079 ALA10VO60DFR1/52L-VSC12N00-SO724 R902452592 ALA10VO60DFR1/52L-VSC62H00 R902414552 ALA10VO60DFR1/52L-VSD11N00 R902430046 ALA10VO60DFR1/52L-VSD11N00-S1388 R992000748 ALA10VO60DFR1/52L-VSD11N00-S1388 R992000920 ALA10VO60DFR1/52L-VSD11N00-S1388 R902469718 ALA10VO60DFR1/52L-VSD11N00-S1388 R902484659 ALA10VO60DFR1/52L-VSD11N00-S1388 R902425045 ALA10VO60DFR1/52L-VSD11N00-S1396 R902418814 ALA10VO60DFR1/52L-VSD11N00-S1396 R992000709 ALA10VO60DFR1/52L-VSD11N00-S1396 R992000730 ALA10VO60DFR1/52L-VSD11N00-S1396 R986110566 ALA10VO60DFR1/52L-VSD11N00-S1396 R986110571 ALA10VO60DFR1/52L-VSD11N00-S1396 R992000961 ALA10VO60DFR1/52L-VSD11N00ES1388 R902484658 ALA10VO60DFR1/52L-VSD11N00ES1388 R986110610 ALA10VO60DFR1/52L-VSD11N00ES1388 R902534753 ALA10VO60DFR1/52L-VSD11N00P-S4265 R986110047 ALA10VO60DFR1/52L-VSD12K01-S1807 R902434362 ALA10VO60DFR1/52L-VSD12K01-S1807 R986110048 ALA10VO60DFR1/52L-VSD12K01-S3403 R902432150 ALA10VO60DFR1/52L-VSD12K01-S3403 R910988462 ALA10VO60DFR1/52L-VSD12K68-SO736 R902439016 ALA10VO60DFR1/52L-VSD12K68-SO834 R910992174 ALA10VO60DFR1/52L-VSD12K68-SO851 R992001295 ALA10VO60DFR1/52L-VSD12K68-SO851 R910988164 ALA10VO60DFR1/52L-VSD12N00 R902554010 ALA10VO60DFR1/52L-VSD12N00 R902430081 ALA10VO60DFR1/52L-VSD12N00-S1388 简介 增加信号幅度或功率的装置，它是自动化技术工具中处理信号的重要元件。放大器的放大作用是用输入信号控制能源来实现的，放大所需功耗由能源提供。对于线性放大器，输出就是输入信号的复现和增强。对于非线性放大器，输出则与输入信号成一定函数关系。放大器按所处理信号物理量分为机械放大器、机电 放大器 放大器 放大器、电子放大器、液动放大器和气动放大器等，其中用得广泛的是电子放大器。随着射流技术(见射流元件)的推广，液动或气动放大器的应用也逐渐增多。电子放大器又按所用有源器件分为真空管放大器、晶体管放大器、固体放大器和磁放大器，其中又以晶体管放大器应用广。在自动化仪表中晶体管放大器常用于信号的电压放大和电流放大，主要形式有单端放大和推挽放大。此外，还常用于阻抗匹配、隔离、电流-电压转换、电荷-电压转换(如电荷放大器)以及利用放大器实现输出与输入之间的一定函数关系(如运算放大器)。 作用 原理:高频功率放大器用于发射机的末级，作用是将高频已调波信号进行功率放大，以满足发送功率的要求，然后经过天线将其辐射到空间，保证在一定区域内的接收机可以接收到满意的信号电平，并且不干扰相邻信道的通信。 高频功率放大器是通信系统中发送装置的重要组件。按其工作频带的宽窄划分为窄带高频功率放大器和宽带高频功率放大器两种，窄带高频功率放大器通常以具有选频滤波作用的选频电路作为输出回路，故又称为调谐功率放大器或谐振功率放大器;宽带高频功率放大器的输出电路则是传输线变压器或其他宽带匹配电路，因此又称为非调谐功率放大器。高频功率放大器是一种能量转换器件，它将电源供给的直流能量转换成为高频交流输出在 '低频电子线路'课程中已知，放大器可以按照电流导通角的不同，将其分为甲、乙、丙三类工作状态。甲类放大器电流的流通角为360o，适用于小信号低功率放大。乙类放大器电流的流通角约等于 180o;丙类放大器电流的流通角则小于180o。乙类和丙类都适用于大功率工作丙类工作状态的输出功率和效率是三种工作状态中高者。高频功率放大器大多工作于丙类。但丙类放大器的电流波形失真太大，因而不能用于低频功率放大，只能用于采用调谐回路作为负载的谐振功率放大。由于调谐回路具有滤波能力，回路电流与电压仍然极近于正弦波形，失真很小。 原理 锁相放大器实际上是一个模拟的傅立叶变换器，锁相放大器的输出是一个直流电压，正比于是输入信号中某一特定频率(参数输入频率)的信号幅值。而输入信号中的其他频率成分将不能对输出电压构成任何贡献。 两个正弦信号，频率都为1Hz，有90度相位差，用乘法器相乘得到的结果是一个有直流偏量的正弦信号。 如果是一个1Hz和一个1.1Hz的信号相乘，用乘法器相乘得到的结果是轮廓为正弦的调制信号，直流偏量为0。 只有与参考信号频率完全一致的信号才能在乘法器输出端得到直流偏量，其他信号在输出端都是交流信号。如果在乘法器的输出端加一个低通滤波器，那么所有的交流信号分量全部被滤掉，剩下的直流分量就只是正比于输入信号中的特定频率的信号分量的幅值。 用途 主要用于检测信噪比很低的微弱信号。即使有用的信号被淹没在噪声信号里面，即使噪声信号比有用的信号大很多，只要知道有用的信号的频率值，就能准确地测量出这个信号的幅值。 基本结构 输入待测信号，经放大和带通滤波后与参考信号共同输入乘法器得到的结果再通过低通滤波器滤波后输出。 分类 集成运算放大器主要类别下面对不同特性的集成运算放大器进行介绍。 通用型集成运算放大器 通用型集成运算放大器是指它的技术参数比较适中，可满足大多数情况下的使用要求。通用型集成运算放大器又分为Ⅰ型、Ⅱ型和Ⅲ型，其中Ⅰ型属低增益运算放大器，Ⅱ型属中增益运算放大器，Ⅲ型为高增益运算放大器。Ⅰ型和Ⅱ型基本上是早期的产品，其输入失调电压在2mV左右，开环增益一般大于80dB。 高精度集成运算放大器 高精度集成运算放大器是指那些失调电压小，温度漂移非常小，以及增益、共模抑制比非常高的运算放大器。这类运算放大器的噪声也比较小。其中单片高精度集成运算放大器的失调电压可小到几微伏，温度漂移小到几十微伏每摄氏度。 高速型集成运算放大器 高速型集成运算放大器的输出电压转换速率很大，有的可达2~3kV/μS。 高输入阻抗集成运算放大器 高输入阻抗集成运算放大器的输入阻抗十分大，输入电流非常小。这类运算放大器的输入级往往采用MOS管。 低功耗集成运算放大器 低功耗集成运算放大器工作时的电流非常小，电源电压也很低，整个运算放大器的功耗仅为几十微瓦。这类集成运算放大器多用于便携式电子产品中。 宽频带集成运算放大器 宽频带集成运算放大器的频带很宽，其单位增益带宽可达千兆赫以上，往往用于宽频带放大电路中。 高压型集成运算放大器 一般集成运算放大器的供电电压在15V以下，而高压型集成运算放大器的供电电压可达数十伏。 功率型集成运算放大器 功率型集成运算放大器的输出级，可向负载提供比较大的功率输出。 光纤放大器 光纤放大器不但可对光信号进行直接放大，同时还具有实时、高增益、宽带、在线、低噪声、低损耗的全光放大功能，是新一代光纤通信系统中必不可少的关键器件;由于这项技术不仅解决了衰减对光网络传输速率与距离的限制，更重要的是它开创了1550nm频段的波分复用，从而将使超高速、超大容量、超长距离的波分复用(WDM)、密集波分复用(DWDM)、全光传输、光孤子传输等成为现实，是光纤通信发展史上的一个划时代的里程碑。在目前实用化的光纤放大器中主要有掺铒光纤放大器(EDFA)、半导体光放大器(SOA)和光纤拉曼放大器(FRA)等，其中掺铒光纤放大器以其优越的性能现已广泛应用于长距离、大容量、高速率的光纤通信系统、接入网、光纤CATV网、系统(雷达多路数据复接、数据传输、制导等)等领域，作为功率放大器、中继放大器和前置放大器。 光纤放大器一般都由增益介质、泵浦光和输入输出耦合结构组成。目前光纤放大器主要有掺铒光纤放大器、半导体光放大器和光纤拉曼放大器三种，根据其在光纤网络中的应用，光纤放大器主要有三种不同的用途:在发射机侧用作功率放大器以提高发射机的功率;在接收机之前作光预放大器以极大地提高光接收机的灵敏度;在光纤传输线路中作中继放大器以补偿光纤传输损耗，延长传输距离。 公司简介： 武汉百士自动化设备有限公司位于武汉洪山区，是一家从事经营自动化仪表备件、液压泵阀的贸易型公司；专注于中国工业传动自动化流体领域。主营产品数控模块、伺服电机、可编程控制器、传感器、气动元件、工业仪器仪表、电磁阀、柱塞泵、液压元件等。经营有：贝加莱B&R、西门子Siemens、本特利bently、爱尔泰克Airtec气动、安沃驰Aventics、博世力士乐rexroth、阿托斯ATOS、迪普马DUPLOMATIC、Parker派克、伊顿EATON VICKERS等。 公司本着创业人为本、发展靠科技、管理出效益、服务至上的理念。为广大的顾客价值 ，为企业效益 ，为员工机遇的发展方向 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