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Tester operačních zesilovačů

28. 3. 2008
Obrazek Toto zapojení představuje modul umožňující jednoduchým a rychlým způsobem rozlišit dobré operační zesilovače od vadných. Tester je navržen pro testování jednoduchých.,dvojitých i čtyřnásobných operačních zesilovačů.
Popis zapojení
Schéma zapojeni testeru je na obrázku.V testeru jsou součástky, které spolu s testovaným operačním zesilovačem vytvářejí multivibrátor.Výstupní signál z multivibrátoru se proudově zesiluje tranzistorů a přivádí na dvě LED diody. Pokud je operační zesilovač dobrý, multivibrátor kmitá a diody LED stříidavě  blikají Je-ti operační zesilovač vadný, nesvítí žádná dioda LED, nebo pouze jedna a to trvale. Aby bylo možné bez složitého přepojováni vývodů testovat jednoduché dvojité i čtyřnásobné operační zesilovače, obsahuje tester tří objímky pro připojení operačního zesilovače celkem sedm shodných obvodů multivibrátorů s indikačními diodami LED, které jsou připojeny ke každému operačnímu zesilovači v každé objímce.Na místě I01 můžeme testovat jednoduché operační zesilovače v pouzdrech DIP8. Jsou to např. typy MAA741,TL061, TL071, TLO8I, TLC271, LF355. LF356,  LF357, NE5534 a další. Příslušné indikační diody LED jsou Dl a D2. Na místě IO2 můžeme testovat dvojité operační zesilovače v pouzdrech DIP8. Jsou to např. typy MA1458, MC1458, LM358, TL062, TL072, TL082, TLC272, NE5532, CA3240 a další. Indikační diody LED prvního operačního zesilovače jsou D3 a D4, druhého D5 a D6. Na místě I03 můžeme testovat čtyřnásobné operační zesilovače v pouzdrech DIL14. Jsou to typy BM324, LM324 TL064, TL074, TLO84, TLC274 a další.Kmitání multivibrátoru s prvním operačním zesilovačem indikují LED diody D7 a D8, s druhým Dl1 a D12 se třetím D13 a D14 a se čtvrtým D9 a D1O.
Technické údaje

Napájecí napětí:           ± 5 až 9V/8OmA

Seznam součástek:
R1,R3,R7,R9,R13,R15,R19,R21,R25                                                          
R27,R31,R33,R37,R39……………………………………………20K
R2,R8,R14,R20,R26,R32,R38…………………………………...820k
R10,R16,R22,R28,,R34,R40…………………………………….1k2
R5,R6,R11,R12,R17,R18,R23                                                        
R24,R29,R30,R35,R36,R41,R42…………………………….....390r
C1,C2,C3,C4,C5,C6,C7………………………………………….220n
C8,C9……………………………………………………………....1M
D1-D11…………………………………………………………......LED
T1,T3,T5,T7,T9,TT11,T13………………………………………..KC238
T2,T4,T6,T8,T10,T12,T14………………………………………..KC308
Objímka DIP8……………………………………………………..2Ks
Objímka Dip14……………………………………………………2Ks
IO1…….(otestování funkce)……………………………………..TL061,TL071,TL081
IO2…….(otestování funkce)……………………………………..TL062,TL072,TL082
IO3…….(otestování funkce)……………………………………..TL064,TL074,TL084
Přepínač…………………………………………………………...1Ks
 

 

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