譯碼器和數(shù)據(jù)選擇器 實驗報告(有數(shù)據(jù))

實驗三譯碼器和數(shù)據(jù)選擇器一、實驗?zāi)康?、熟悉集成譯碼器。2、學(xué)習(xí)集成譯碼器和數(shù)據(jù)選擇器的應(yīng)用。二、實驗儀器及器件1、雙蹤示波器2、實驗用元器件①74LS1392—4線譯碼器1片②74LS153雙4選1數(shù)據(jù)選擇器1片③74LS00二輸入端四與非門1片實驗內(nèi)容及結(jié)果分析1、譯碼器功能測試將74LS139譯碼器電路按圖2.1接線，參照表2.1輸入電平，測試輸出狀態(tài)并填入表中。表2.1A使能選擇輸出GBAY0Y1Y2Y31XX11110000111001101101011010111110表2.1BVCC=5vVG/VVB/VVA/VVY0/VVY1/VVY2/VVY3/V高電平5.0015.0005.0034.0844.0864.3904.083低電平0.0000.0010.0010.1420.1390.1470.138表2.1使能選擇輸出GBAY0Y1Y2Y31XX111100001110011011010110101111102、譯碼器轉(zhuǎn)換將雙２－４線譯碼器轉(zhuǎn)換為３－８線譯碼器。⑴畫出轉(zhuǎn)換電路圖；⑵在實驗箱上接線并驗證設(shè)計是否正確；⑶填寫該3-8線譯碼器功能表2.2。表2.2A輸入輸出1G1B1A2G2B2A1Y01Y11Y21Y32Y02Y12Y22Y30001XX011111110011XX101111110101XX110111110111XX111011111XX000111101111XX001111110111XX010111111011XX01111111110表2.2BVCC=5v輸入輸出V1G/vV1B/vV1A/vV2G/vV2B/vV2A/vV1Y0/vV1Y1/vV1Y2/vV1Y3/vV2Y0/vV2Y1/vV2Y2/vV2Y3/v高電平4.9944.9974.9964.9974.9974.9974.1374.1404.1344.1374.1374.1344.1304.134低電平0.0000.0010.0020.2200.0010.0110.1400.1370.1460.1370.1440.1390.1450.137表2.2輸入輸出1G1B1A2G2B2A1Y01Y11Y21Y32Y02Y12Y22Y30001XX011111110011XX101111110101XX110111110111XX111011111XX000111101111XX001111110111XX010111111011XX011111111103、數(shù)據(jù)選擇器的測試及應(yīng)用⑴將雙4選1數(shù)據(jù)選擇器74LS153參照圖2.3.2接線，測試其功能并填寫表2.3。表2.3A選擇端數(shù)據(jù)輸入端輸出控制端輸出狀態(tài)BA1C01C11C21C31G1YXXXXXX10000XXX00001XXX0101X0XX0001X1XX0110XX0X0010XX1X0111XXX00011XXX101表2.3BVCC=5v選擇端數(shù)據(jù)輸入端輸出控制端輸出狀態(tài)VB/vVA/vV1C0/vV1C1/vV1C2/vV1C3/vV1G/vV1Y/v高電平4.9984.9984.9984.9984.9984.9984.9993.782低電平0.0030.0010.0010.0010.0020.0010.0000.106表2.3選擇端數(shù)據(jù)輸入端輸出控制端輸出狀態(tài)BA1C01C11C21C31G1YXXXXXX10000XXX00001XXX0101X0XX0001X1XX0110XX0X0010XX1X0111XXX00011XXX101⑵將實驗箱脈沖信號源中固定連續(xù)脈沖4個不同頻率的信號接到數(shù)據(jù)選擇器4個輸入端，輸出端1Y接示波器，選擇端（A，B）仍按表2.3狀態(tài)改變，分別觀察4種不同頻率的脈沖信號。表2.4選擇端輸出控制端輸出頻率BA1GF(KHZ)00024.0001047.9310095.82110191.724、七段數(shù)碼管譯碼電路向?qū)嶒炏渖系淖g碼器輸入端1A～1D，2A～2D分別輸入8421BCD碼，觀察1，2兩個數(shù)碼管顯示輸出的符號。表2.51A1B1C1D輸出符號2A2B2C2D輸出符號000000000001000100100010001100110100010001010101011001100111