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Ìèíèñòåðñòâî îáùåãî è ïðîôåññèîíàëüíîãî îáðàçîâàíèÿ

Ðîññèéñêîé Ôåäåðàöèè

 

ÒÂÅÐÑÊÎÉ ÃÎÑÓÄÀÐÑÒÂÅÍÍÛÉ ÒÅÕÍÈ×ÅÑÊÈÉ ÓÍÈÂÅÐÑÈÒÅÒ

 

 

 

 

 

 

 

 

Êàôåäðà ÀÒÏ

Êóðñîâàÿ ðàáîòà ïî ýëåêòðîíèêå.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                             Âûïîëíèë: ñòóäåíò                                                                                  

                                                                                ãðóïïû ÈÄÌ-314

                                                                                  Ìàëèíêèí À.À.

                                                                                              Ïðîâåðèë:  

 

 

 

                   

 

 

Òâåðü 2003 ã.

 

 

             Öåëü ðàáîòû:

             Óñèëèòü âõîäíîé àíàëîãîâûé ñèãíàë äî çàäàííîãî óðîâíÿ è ïðåîáðàçîâàòü

             åãî â öèôðîâîé.

 

             Äàíî:                

                                            

                             áèïîëÿðíûé

                            

 

            Äëÿ íîðìàëüíîé ðàáîòû ñõåìû íåîáõîäèìî ïðàâèëüíî ïîäîáðàòü ÎÓ.

            Íàéä¸ì êîýôôèöèåíò óñèëåíèÿ

 

        

         Ñëåäîâàòåëüíî, íóæíî èñïîëüçîâàòü 100% îáðàòíóþ ñâÿçü.

 

 

 

 

 

 

 

 

 

             ×àñòîòà åäèíè÷íîãî êîýôôèöèåíòà óñèëåíèÿ

             Íàïðÿæåíèå ñìåùåíèÿ , ò.å. Â.

             Ïî ýòèì õàðàêòåðèñòèêàì â òàáëèöå íàõîäèì ïîäõîäÿùèé óñèëèòåëü:

 

            

            OP 1177                         èëè:        OP 27     

            $ 0.8                                      $ 1.05     

                                                                            

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

           Ïîäáåð¸ì ÀÖÏ.

           Äëÿ ýòîãî íóæíî îïðåäåëèòü ÷àñòîòó äèñêðåòèçàöèè è ðàçðÿäíîñòü:

     

           ÷àñòîòà äèñêðåòèçàöèè

             ,

          ,

         ;

       ðàçðÿäíîñòü ÀÖÏ

        ,

        ; 1024 > 1000, çíà÷èò, ðàçðÿäíîñòü ÀÖÏ – 10 Áèò.

 

       Ïî ýòèì ïàðàìåòðàì èç òàáëèöû âûáèðàåì ñëåäóþùèé ÀÖÏ:

       AD 7470       10 Áèò

                             U = 2.5 Â

                             äî 20 ÌÃö

 

 

     

        Ïîäáîðêà RC ôèëüòðà. 

        Ñòðîèì ãðàôèê:

         

 

 

                                        Íàêëîí ëèíèè îïðåäåëÿåòñÿ ïî

                                    ôîðìóëå n*20äÁ, ãäå

                                     n – ïîðÿäîê ôèëüòðà.

 

 

 

 

 

 

 

 

 

 

 

    

        Âûáèðàåì ôèëüòð ÷åòâ¸ðòîãî ïîðÿäêà. Ðàññ÷èòàåì ¸ìêîñòü äëÿ RC ôèëüòðà,

         âçÿâ ñîïðîòèâëåíèå R çà 5 Îì, òîãäà

 

        

 

 

 

Èòîãîâàÿ ñõåìà

 

 

 

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