Chii chinonzi PMOSFET, unoziva here?

I. Mamiriro ekutanga uye nheyo yekushanda

1. Basic chimiro

PMOSFETs ine n-mhando substrates uye p-channel, uye chimiro chavo chinonyanya kuve negedhi (G), sosi (S) uye dhiraivha (D). Pane iyo n-mhando silicon substrate, kune maviri P+ matunhu anoshanda sesosi uye dhiza, zvichiteerana, uye akabatana kune mumwe nemumwe kuburikidza ne-p-chiteshi. Gedhi riri pamusoro pegwara uye rakaparadzaniswa negwara nesimbi oxide insulating layer.

2. Nheyo dzekushanda

PMOSFETs inoshanda zvakafanana kune NMOSFETs, asi neyakapesana nemhando yevatakuri. Mune PMOSFET, iwo makuru anotakura maburi. Kana simba risina kunaka rinoshandiswa kugedhi maererano nekwakabva, p-type inverse layer inoumbwa pamusoro pe-n-type silicon pasi pegedhi, iyo inoshanda semugero unobatanidza chitubu uye kudonha. Kuchinja gedhi voltage inoshandura density yemakomba muchiteshi, nekudaro ichidzora conductivity yechiteshi. Kana magetsi egedhi akadzikira zvakakwana, kuwanda kwemakomba ari mugero kunosvika pakakwirira zvakakwana kubvumira conduction pakati pechitubu nekudonhedza; ukuwo, gwara rinodimbura.

II. Hunhu uye mashandisirwo

1. Hunhu

Low Mobility: P-channel MOS transistors ine yakaderera gomba kufamba, saka transconductance yePMOS transistors idiki pane iyo yeNMOS transistors pasi peiyo yakafanana geometry uye inoshanda voltage.

Inokodzera kushandiswa kwepasi-speed, yakaderera-frequency applications: Nekuda kwekufamba kwakadzika, PMOS masangano akabatanidzwa anonyanya kukodzera kushandiswa munzvimbo dzakaderera, dzakaderera-frequency.

Mamiriro ekuitisa: Mamiriro ekuita ePMOSFET akatarisana neNMOSFETs, zvinoda gedhi remagetsi rakaderera pane iro sosi voltage.

 

1. Applications

Yakakwira Side Kuchinja: PMOSFETs anowanzo shandiswa mune yakakwira side switching masisitimu uko sosi yakabatana kune yakanaka inopa uye dhiraivha yakabatana kune yakanaka magumo emutoro. Kana iyo PMOSFET ichiita, inobatanidza magumo akanaka emutoro kune yakanaka inopa, ichibvumira ikozvino kuyerera nemutoro. Iyi gadziriso yakajairika munzvimbo dzakadai sesimba manejimendi uye mota madhiraivha.

Reverse Dziviriro Circuits: PMOSFETs inogona zvakare kushandiswa mune reverse kudzivirira maseketi kudzivirira kukuvadzwa kudunhu kunokonzerwa nereverse magetsi ekupa kana kurodha ikozvino backflow.

III. Kugadzira uye kufunga

1. GATE VOLTAGE CONTROL

Paunenge uchigadzira PMOSFET maseketi, kunyatso kudzora kwegedhi voltage kunodiwa kuti uve nechokwadi chekushanda kwakaringana. Sezvo maitiro ekuitisa ePMOSFET akatarisana neaya eNMOSFET, kutarisisa kunoda kubhadharwa kune polarity uye ukuru hwegedhi voltage.

2. Mutoro wekubatanidza

Kana uchibatanidza mutoro, kutarisisa kunoda kubhadharwa kune polarity yemutoro kuona kuti ikozvino inoyerera nemazvo kuburikidza nePMOSFET, uye mhedzisiro yemutoro pakuita kwePMOSFET, sekudonha kwemagetsi, kushandiswa kwemagetsi, nezvimwe. , inodawo kutariswa.

3. Kugadzikana kwekushisa

Kuita kwePMOSFETs kunokanganisa zvakanyanya netembiricha, saka mhedzisiro yetembiricha pakuita kwePMOSFET inoda kuverengerwa pakugadzira maseketi, uye matanho anoenderana anofanirwa kutorwa kuvandudza kugadzikana kwetembiricha yemaseketi.

4. Dziviriro matunhu

Kuti udzivise PMOSFETs kubva pakukuvadzwa nekupfuura uye overvoltage panguva yekushanda, masekete edziviriro senge overcurrent kudzivirira uye overvoltage kudzivirira anofanirwa kuiswa mudunhu. Aya maseketi ekudzivirira anogona kunyatso chengetedza PMOSFET uye kuwedzera hupenyu hwayo hwesevhisi.

 

Muchidimbu, PMOSFET imhando yeMOSFET ine chimiro chakakosha uye musimboti wekushanda. Kuderera kwaro kwekufamba uye kukodzera kune yakaderera-speed, yakaderera-frequency application inoita kuti ishandiswe zvakanyanya mundima chaidzo. Paunenge uchigadzira PMOSFET maseketi, kutarisisa kunoda kubhadharwa kune gedhi voltage control, mitoro yekubatanidza, kugadzikana kwetembiricha uye maseketi ekudzivirira kuti ive nechokwadi chekushanda kwakanaka uye kuvimbika kwedunhu.