Mienzaniso yeMibvunzo yeKukurukurirana kweTransistor
Matransistor zvinhu zvakakosha zvemagetsi zvinoita basa rakakosha mumidziyo yese yemagetsi yemazuva ano. Achishanda semaswitch nemasignal amplifiers, matransistor anogonesa matekinoroji epamusoro senge makomputa, nharembozha, nezvimwe zvishandiso zvakawanda. Muchinyorwa chino, tichakurukura mienzaniso yakati wandei nemhinduro dzayo kuti tinzwisise zviri nani mashandiro anoita matransistor.
1. Nhanganyaya kuTransistors
Tisati tapinda mumatambudziko emuenzaniso, ngatitaurei zvishoma nezvema transistors pachawo. Transistor chikamu che semiconductor chinoumbwa nezvikamu zvitatu zvezvinhu zvakasiyana, zvinowanzozivikanwa seNPN kana PNP, zvichienderana nekuiswa kwedoping kwezvinhu zve semiconductor. Ine materminal matatu: Base (B), Emitter (E), uye Collector (C).
Mhando dzeTransistors
– NPN Transistor: Rudzi rwetransistor uko hwaro hwepasi huri pakati pezvikamu zviviri zvemhando yeN.
– PNP Transistor: Rudzi rwetransistor uko hwaro hwepasi huri pakati pezvikamu zviviri zveP-type.
Mhando mbiri idzi dzematransistors dzinoshanda nenzira yakafanana, asi mafambiro aripo uye polarity yebias zvakasiyana.
Basa reTransistor
– SeSwitch: Matransistor anogona kushandiswa kubatidza kana kudzima magetsi ari mudunhu.
– Seamplifier: Matransista anogona kuwedzera masaini madiki ekupinda kuita ma output makuru.
2. Mibvunzo yemuenzaniso nekukurukurirana
Mubvunzo 1: Kugadziriswa Kwakajairwa Kwebase paNPN Transistor
Mubvunzo: Transistor yeNPN ine common base configuration ine emitter current (IE) ye5 mA uye collector current (IC) ye4.9 mA. Sarudza base current (IB) uye α (alpha) parameter ye transistor.
Kukurukurirana:
- Zvinozivikanwa:
– Emitter current (IE) = 5 mA
– Muunganidzi wemagetsi (IC) = 4.9 mA
– Mubvunzo: Base current (IB) uye parameter α.
1. Kuverenga Base Current:
Iyo base current inowanikwa kubva mu equation:
\[
I_E = I_B + I_C
\]
Saka,
\[
I_B = I_E – I_C = 5 \text{mA} – 4.9 \text{mA} = 0.1 \text{mA}
\]
2. Kuverenga Paramita α:
Paramendi α (alpha) ndiyo chiyero chiri pakati pemuunganidzi wezvino uye emitter current:
\[
\alpha = \frac{I_C}{I_E} = \frac{4.9 \text{mA}}{5 \text{mA}} = 0.98
\]
Saka, base current (IB) i0.1 mA uye kukosha kweparameter α i0.98.
Mubvunzo 2: Kugadziriswa Kwakajairika kweEmitter paNPN Transistor
Mubvunzo: Transistor yeNPN ine base current (IB) ye20 µA uye base current gain (β) ye100. Verenga collector current (IC) uye emitter current (IE).
Kukurukurirana:
- Zvinozivikanwa:
– Simba remagetsi (IB) = 20 µA
– Kuwana kwesimba remagetsi (β) = 100
– Mubvunzo: Muunganidzi wemagetsi (IC) uye emitter current (IE).
1. Kuverenga Mari Inounganidzwa:
Muunganidzi wezvino unowanikwa kubva mu equation:
\[
I_C = \beta \nguva I_B = 100 \nguva 20 \chinyorwa{µA} = 2000 \chinyorwa{µA} = 2 \chinyorwa{mA}
\]
2. Kuverenga Emitter Current:
Iyo emitter current inowanikwa kubva mu equation:
\[
I_E = I_B + I_C = 20 \chinyorwa{µA} + 2000 \chinyorwa{µA} = 2020 \chinyorwa{µA} = 2.02 \chinyorwa{mA}
\]
Saka, collector current (IC) i2 mA uye emitter current (IE) i2.02 mA.
Dambudziko rechitatu: Dunhu reTransistor Amplifier
Mubvunzo: Mudunhu reNPN transistor amplifier, base-emitter voltage (V_BE) i0.7V, collector-emitter voltage (V_CE) i5V, uye power supply voltage (V_CC) i12V. Kana collector resistor (R_C) iri 1 kΩ uye base current (IB) iri 30 µA, sarudza collector current (IC) uye collector voltage (V_C).
Kukurukurirana:
- Zvinozivikanwa:
– Voltage yebase-emitter (V_BE) = 0.7V
– Voltage yemuunganidzi-emitter (V_CE) = 5V
– Voltage inobva (V_CC) = 12V
– Muunganidzi wemuchina (R_C) = 1 kΩ = 1000 Ω
– Simba remagetsi (IB) = 30 µA
– Mubvunzo: Kuunganidza magetsi (IC) uye voltage yekuunganidza (V_C).
1. Kuverenga Kuwana Kwezvino KweBase (β):
Kubva pane zvataurwa pamusoro apa, tinogona kufunga kuti transistor iri muchimiro chekushanda. Saka tinoshandisa:
\[
V_{CE} = V_C – V_E = 5V
\]
Sezvo V_E iri diki kana tichienzanisa neground (kazhinji 0V), saka:
\[
V_C \inenge 5V
\]
2. Kuverenga Mari Inounganidzwa:
Current yemuunganidzi inogona kuverengerwa uchishandisa mutemo weOhm:
\[
I_C = \frac{V_{CC} – V_C}{R_C}
\]
Kutsiva kukosha:
\[
I_C = \frac{12V – 5V}{1000 Ω} = \frac{7V}{1000 Ω} = 7 \text{mA}
\]
3. Kuverenga Voltage yeMuunganidzi:
Kushandisa simba rakaverengerwa:
\[
V_C = V_{CC} – (I_C \times R_C) = 12V – (7 \text{mA} \times 1000 Ω) = 12V – 7V = 5V
\]
Saka, collector current (IC) i7 mA uye collector voltage (V_C) i5V.
Mhedziso
Matransistor zvinhu zvakakosha mumagetsi, zvinoshanda semaswitch nema amplifiers. Nekunzwisisa mienzaniso yakaita seiri pamusoro apa, tinogona kushandisa matransistor zviri nyore mumhando dzakasiyana dzemacircuit. Kunzwisisa maparameter akadai sebase current, collector current, collector-emitter voltage, uye base current gain (β) idanho guru mukugadzira nekuongorora maelectronic circuit. Tinovimba kuti chinyorwa chino chave chichibatsira mukuwedzera ruzivo rwedu nezvematransistor!
