Diod xarakteristikasi Maqsadlar

1. 
   ^{Diod xarakteristikasi}
   

Maqsadlar

• 
  Diod zanjirda klapan sifatida
  
• 
  Tokdagi kuchlanishni statik qayd etish
  

• 
  Tok- kuchlanich xarakteristikasining dinamik ko’rinishi
  

• 
  Diodlarning differensial qarshiligi
  

Jihoz Cat. No.
Sxema elementlari:

1	Cho’g’lanma lampa
	E10 12V/3W	505 08
1	Rezistor 1 k/2W	577 44
1	Ge diod AA 118	578 50
1	Si Diod 1N4007	578 51
1	Patron E10, top	579 06

Meters:

1	Multimetr DMM120	531 172
1	Multimetr METRAport 3A	531 57
1	Ikki kanalli osilliloskop
	400	575 212

Quvvat ta’minoti birligi:

1	Tayanch bord	726 50
1	Bog’lovchi o’tkazgichlar to’plami BNC/4mm	575 24
1	Perenoskalar to’plami 19 mm	501 48
1	O’lchash o’tkazgichlari komplekti	501 532

1 O’zgaruvchan tok/Doimiy tok quvvati 521 485 Aksessuarlar:

Mashq 1: Diod zanjirda klapan sifatida

Rasm 1.1

Rasm 1.1 da ko’rsatilganidek, sxemani yig’ing va ishchi kuchlanish V_B = 12 V ni kirishga ulang. Natijani qayd etib boring.
Lampa yonadi.

Ishchi kuchlanishni o’chiring. Ulashmalarni dioga o’zaro alishtiring (katodga+12 V) va kuchlanishni yana yoqing.

Lampa yonmaydi.

Lampaning yonishi uchun kerakli tok va dioddagi kuchlanish manbai qutbliligi o’rtasida qanday bog’liqlik bor?

Lampani yoqish uchun kerak bo’lgan tok faqatgina katod quvvat manbaining manfiy klemmasiga ulanganidagina (anod musbat klemmaga) oqishi mumkin.
Mashq 2: Tok-kuchlanish xarakteristikasining statik qayd etilishi

Rasm 1.2

Rasm1.2 ga asosan sxemani yig’ing va Jadval 1.1 da berilgan kuchlanishlar uchun tokni o’lchang.

	AA 118	1N4007
VF/V	IF/mA	IF/mA
0.00	0.00	0.00
0.10	0.01	0.00
0.20	0.16	0.00
0.25	0.31	0.00
0.30	0.53	0.00
0.35	0.83	0.00
0.40	1.13	0.01
0.50	2.06	0.16
0.55	2.48	0.48
0.60	3.07	1.52
0.65	3.72	4.11
0.70	4.35	11.17
0.72	4.60	17.76

Jadval 1.1

Rasm 1.3 dagi diagrammada berilgan jadval 1.1 ni chop eting va tegishli tok-kuchlanish xarakteristikalarini I_F  f(V_F) chizing.

Rasm. 1.3
Germanium va kremniy diodlarining xarakteristik egriliklarini belgilang va har bir egrilikning taxminan to’g’ri chiziqli qismiga urinma chizib, diodning V_TO bo’sag’ali kuchlanishini aniqlang, urinmalar kuchlanish o’qini kesib o’tsin.

Ge diodi	VTO  0.34	V
Si diodi	VTO  0.66	V

Zonadagi ikkita xarakteristikani solishtiring va izoh bering. V_F  V_TO

Kremniy diod xarakteristikasi bo’sag’a kuchlanishida V_TOgermaniy diodinikidan tikkaroq.