Ndeupi mutsauko uripo pakati peMOSFET neTriodes kana uchishandiswa sema switch?

MOSFET uye Triode zvinhu zvakajairika zvemagetsi, zvese zvinogona kushandiswa semagetsi switch, asiwo panguva dzakawanda kuchinjanisa kushandiswa kwekuchinja, sechinjo yekushandisa,MOSFETuye Triode vane zvakawanda zvakafanana, kunewo nzvimbo dzakasiyana, saka iyo miviri inofanira kuva nzira yekusarudza?

 

Triode ine NPN mhando uye PNP mhando.MOSFET zvakare ine N-channel uye P-channel.Mapini matatu eMOSFET gedhi G, drain D uye source S, uye mapini matatu eTriode base B, muunganidzi C uye emitter E. Ndeupi musiyano uripo pakati peMOSFET neTriode?

 

 

N-MOSFET uye NPN Triode inoshandiswa sechinjo musimboti

 

(1) Kusiyana kwekutonga maitiro

Triode ndeyezvino-mhando yekudzora zvikamu, uye MOSFET imagetsi ekudzora magetsi, Triode pane yekupinda voltage zvinodiwa padivi rekutonga yakadzikira, kazhinji 0.4V kusvika 0.6V kana kupfuura inogona kuwanikwa Triode pa, nekushandura base muganho. ikozvino resistor inogona kuchinja base ikozvino. Iyo MOSFET inodzorwa-inodzorwa nevoltage, iyo voltage inodiwa pakuitisa inowanzoita 4V kusvika 10V, uye kana saturation yasvika, voltage inodiwa inenge 6V kusvika 10V. Mukutonga kwezviitiko zvakaderera zvemagetsi, kushandiswa kwakajairwa kweTriode se switch, kana Triode senge buffer control MOSFET, senge microcontrollers, DSP, PowerPC uye mamwe ma processor I / O port voltage yakadzikira, chete 3.3V kana 2.5V. , kazhinji haizodzoreri zvakanangaMOSFET, iyo yakaderera voltage, MOSFET haigone kuve conduction kana kupikisa kwemukati kweiyo yakakura kushandiswa mukati Muchiitiko ichi, Triode control inowanzoshandiswa.

 

(2) Kusiyana kwekupinza impedance

Triode's input impedance idiki, MOSFET's impedance yekupinda yakakura, iyo junction capacitance yakasiyana, Triode's junction capacitance yakakura kupfuura MOSFET, chiito zvinoenderana neMOSFET kukurumidza kupfuura Triode;MOSFETmukugadzikana kwezviri nani, ndeye multi conductor, ruzha rudiki, kugadzikana kwekupisa kuri nani.

Kupokana kweMOSFET kwemukati kudiki kwazvo, uye Triode's on-state voltage kudonha kunenge kuripo, mudiki nguva dzazvino, kazhinji shandisa Triode, uye shandisa MOSFET kunyangwe iyo yemukati kuramba idiki kwazvo, asi iripo yakakura, kudonha kwemagetsi zvakare. yakakura kwazvo.