α្αុα α’េα‘ិα
α្αូαិ αែααា α្αα់α៊ីα្α័α Darlington (αាαូαៅαេα ៅαាαួα αូ Darlington ) αឺαាαα
αាαα្α័α្αααិαេααៃαាααα
αាαិαេααួααែαα្αើα‘ើααោα
αីα α្αα់α៊ីα្α័ααាαα៉ូα‘ា αាαα្αាα់α្αុαααៀααួααែααα
្α
ុα្αα្ααាααα្αីαα±្ααំαោαα្αα់α៊ីα្α័ααំαូαα្αូααាααα្αីαα±្ααំαα្αែααៀααោααើααីαីααួα។ [1] αាααំαα់αα
αាαα្α័α្ααេះα្αα់αូα α
ំαេααាαេααα
្α
ុα្αα្α α្αα់ αាαα្αα់α៊ីα្α័ααែααាαααα
េααាα
់αោαα‘ែααីα្αា។αាαិαា
α₯αិαាαα
αំαាំα Darlington αាαα₯αិαាαααូα
Transistor αែαួααាαα័ααាαាαាααូαα្αាααួαα’្ααα្ααូααិαα’្ααα
α្αα។ αាαូαៅαាαα្αើααូααាααើαα‘ើαα្αα់αាαេααα
្α
ុα្αα្α (α្αα ែααាααα
ំαេααៃα្α៊ីαα័ααាំααីααោααាααែαុααα្αៃΞ²ααα់αាαួαα្αា) ។ αៅα្αុααាααិα, α§αααα៍αួααα្α
ូαα្αា [ αំα្αឺα្αូααាααាα
ាំαាα
់ ] αាααីαាំ (B, C, αិα E) αៅαឹαα’្αααែαα្ααៀαα៉ាααូαាααៃα្αα់α៊ីα្α័αα្αα់αាα។
αំαាα់αំαααូαៅααាααំαើαααាααាαុαាαេααα
្α
ុα្αα្ααិααាααើαα‘ើααាαុα្ααα្αូααាαα្αα់αោα:
α្ααិααើ Ξ² 1 αិα Ξ² 2 αាααα្αិαα្αα់ (αាα់αα), αំαាα់αំαααេះα’ាα
α្αូααាαα៉ាα់α្αាααោα:
αុααα្αα្αិ
αួα transistor Darlington αα្ααាαាαα
ំαេααα
្α
ុα្αα្ααី 1000 α¬α
្αើααូα
្αេះαាαាααែαូαα្αាααα
្α
ុα្αα្ααូα
αួααឺα្αូααាααាα
ាំαាα
់αើα្αីα្αើα±្ααូαα្αាα់α្αូααៅαើα
αα្αα្αូαα្αα់αាα។
αុααិαα្αិ [ αែα្αែ ]
αុααិαα្αិαួααឺαាαាααើαα្αេααα្αα ាα់α្αα ែααៃαα់α្αុααូαα្αាα emitter ។ αោααាααាαα
ំαុα
α្ααα្ααីαααាααូαα្αាααិαα’ាំααេα្αាααៃ transistor Darlington αα់α្αុα base emitter α្αើαឹααααូααៃαα់α្αុα base emitter:
α
ំαោះαα
្α
េααិα្αាαែααាααូαα្αាααើα៊ីαីαូαែααាαα្αែααែα V BEi αីαួαα αាαα្αα ែα 0,65 V αៅαេααែαα§αααα៍αេះαំαុααំαើααាααៅα្αុααំαα់ααα្αα¬α្α’ែαααៅαៀααα់α្αុααូαα្αាαααα់α§αααα៍α’េαូαឺ 1.3 V.
α§ααα្ααួααៀαααα់ Darlington αឺαាααα្αើαα៉ុα "αិα្αិαាα" ។ transistor αិα្ααααិαα្αូααាαα’αុα្αាαα±្α saturate (αាαα័ααាα
ំαុα
α្ααα្αα្ααូααូαα្αាαααα់αាα្αូααែαាααα្ααៈαα្α
្αាαα្αុα) αោααាααែ transistor αំαូααៅαេα saturated αα្αើαααិαោαα់α’αិα្ααាαα៉ាα៉ាα‘ែααេααេα (100%) ααាαα’្ααα្ααូααិααូαα្αាαααα់ transistor αីαីα។ [2] αោααាαα៉ុα collector-emitter α្αើαឹααααូααៃαα់α្αុα base emitter ααα់αាαិαα៉ុα collector-emitter αៃ transistor αំαូααាំαααិαាααិα្ααាααៅα្αុαα្ααិαα្αិαាααα្ααាαាαែααែαើααីαα់α្αុα base emitter ។ (αៅα្αុααិαិα្ααα្αា,αាαិα
្α
αាα។ αូα
្αេះα៉ុα "αិα្αិαាα" αៃ transistor Darlington αឺ V BE (α្αα ែα 0,65 α៉ុααៅα្αុαα៊ីαីαូα) α្αα់αាααα់α្αុααα់α្αុααែαួααែααាαα្ααាαាα 0.1 - 0,2 V αៅα្αុαα៊ីαីαូα។ α
ំαោះα
αα្ααាαα្ααូαα្αើα្αាαុααិαα្αិαេះαាαα័ααាαាαឹααα្αើαα’ំαាα
αៃα
αα្α Darlington αៅαើ transistor αែαួα។ αាααα្αើααα្αិααិα្ααααាαα’ាα
αα្αាαα±្ααាααα្α ាαៅαេααៀα្αីαα្ααិα្αា TTL α្αូααាααំαុα។
αα្α ាαួααៀααឺαាααាα់αα្ααα្αឿαα¬αាαα្αើααααោααាααែα្αα់α៊ីα្α័ααំαូααិαα’ាα
αα់α្αាα់α៉ាαα្αាំααៃα
αα្ααូαα្αាαααα់αីαីααែαα្αើα±្αα§αααα៍αឺαα្αុααាααិα។ αើα្αីαាα់αα្αααេះ transistor αីαីααាαឹααាα់αាααα់α៊ីαេαៃαីααីαα ohms αα្αាα់ααាααូαα្αាαααα់α្αួααិαα្αាαីα emitter ។ [1] α្αីαα័ααេះα្αα់αូαα្αូααα្α ូαα
ុះα្αោααα្αាα់αាαα
ោαα្ααាα់αែαα្ααូααាααៅα
ំαុα
α្ααα្αααα់ emitter-jitter αែαα’αុα្αាαα±្α transistor αាα់αែαឿα។
αូ Darlington αាααាαα្αាα់α្αូααំαាα់αាααα្αែααៅα្αេαα់α្αα់αាα transistor αែαួαα ើαα េαុαូα
្αេះα’ាα
αាααឹααិαα្αិαα្αេααោα αាαα្ααិαα្αα’αិα្ααាα (α§αាα αα៍α្αα័α្ααែαα្αើαាααំαα់αα
αាαα្α័α្ααេះα’ាα
αាα αα្αិααាα αោααាααែαាααα្αាααេααα្αែαααα់ transistor) ។
αាααេα α្α α់
α§αααα៍α
α្αុះα’ាα
α្αើαំα ំα្αុααិα
αាααីαα្αα់α៊ីα្α័ααីα្αោះαួααេα’ាα
α្αើα§αααα៍ α
ែααំαែα ។ αូ Darlington αួααα្α
ូαα្αាαាαα្α
α់α្α
ាα់α្α
ាααៅα្αុααα្α
α់α្αα់α៊ីα្α័αα¬αាα§αααα៍α’ាαេ (αាαូαៅα្αាំαី) αៅα្αុα αៀα្αីαα្α
ូαα្αា ។
αូ Darlington α’ាα
α្αើαាααាαα្α
α់αួααα្α
ូαα្αាα¬α’ាα
α្αូααាαα្αើαីαីαα្αα់α៊ីα្α័ααាα
់αីα្αា។ αំαួα αី 1 , α្αα់α៊ីα្αៅαាαα្αេααៅα្αុαα្αាα្αាαα’ាα
αាα្ααេααាααααាαα៉ុα្αែαα្ααា Q 2 (αៅαាαα្αាំ) αឹαα្αូααាααាαααα្αα់។ α’្ααα្ααូαα’αិαααាαα
្α
ុα្αα្α I C (α’αិαααា) αៃαូαេះαឺαាαៃα្αីαាα αី 2 ។ α§αααα៍αាααααួααα្α
ូαα្αាαα្ααាαឺ 2N6282 αែααួααα្α
ូααាំααុαα័ααិαα
αα្ααិααាααំαើααα
្α
ុα្αα្α 2400 αៅ I C = 10A ។
αα្ααិαី
αុαα្αិαាα
αូαាα់αីααុαα’ាα
αាααα្ααៈα្αα់α្αាα់αើα្αីα្αើααααៅαឹαα
αα្αα្αααាα់αោαα
αα្αα៉ះαូα្αីαែαៅαα់αុααិ្ααាαα៏αោα។ αូα
្αេះαាα’ាα
αα្αើααំαាα់αាααα្α
ូααៃαាαα៉ះ - α្ααាα់α’α្αααូα
αំ។
Amplification
α្αα់α៊ីα្α័α Darlington α’ាα
α្αូααាαα្αើαៅα្αុααាαα្αα់αាαេααα
្α
ុα្αα្α [ αំα្αឺα្αូααាααាα
ាំαាα
់ ] αៀα្αី, αូα
αាα’្αααែααាα់α័α្ααឹααាαα្αួααិαិα្αα៉ូαូα¬αុំα្αូα័ααα្αូα។ αα
្α
ុα្αα្αα្αូααាααα្αីααីαα្αិααាααα្ααាαៃαα្αាα់ααិααុំα្αូα័ααៅα
ំαួααែαα្αូααាααោαα§αααα៍αែααាααα្αាα់។

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