The teacher can give a simple said the triode switch how to do?
Thank you

CodePudding user response:

The reference to the digital circuit, it probably means the size of the test current, if the current more than kill considered conducting state, if it is below this value is disconnected,

CodePudding user response:

http://www.elecfans.com/yuanqijian/sanjiguang/20091124113512.html

CodePudding user response:

Why can do switch triode,, in fact, the CE have a great electric current flows through the two level, is the triode conduction,, triode conduction condition is what? ,,, Ube is greater than the open voltage, are you in between Ube voltage is greater than the open voltage, then he opened the, less than, is closed

CodePudding user response:

Direct current (dc),

Alternating current switch can be used to switch tube relay,

General switch tube (triode) to the ac switch not only have a single problem, pressure is also a problem,

There is a kind of bidirectional thyristor (SCR), can be used as a communication switch,

CodePudding user response:

Is commonly used to control the dc

CodePudding user response:

Do with under direct current switch triode usually use, triode is current control device, in the district, Ic increases with the increase of the Ib; In saturated conductivity, the Ic is not with Ib increases, the switch is using expiration and saturated triode conduction to use two kinds of state, main is to control the Ib current, to use the positive and negative feedback to change the Ib size,

CodePudding user response:

If use communication, the reverse breakdown bad ~

CodePudding user response:

Direct current (dc), opened the junior middle school physics textbooks, alternating current (ac) is the size of the phase of cyclical changes in electricity, do switch control transistor is similar to dc PWM wave,

CodePudding user response:

DC, DC

CodePudding user response:

Transistor has three states the saturation, the globe, amplifier, saturated deadline for switch state, namely the three state is depends on the base current, base current is too small, so the deadline is too big that is saturated, modest amplification

CodePudding user response:

Is commonly when do switch triode in saturated zone and the area, state of concrete depends on the parameters of the circuit, you application is with faint small signal to control dc,

CodePudding user response:

Tend to be direct current

CodePudding user response:

Alternating current (ac), or the pulse current is likely to be amplified,

CodePudding user response:

Transistor has three states the saturation, the globe, amplifier, saturated deadline for switch state, namely the three state is depends on the base current, base current is too small, so that by the is too big, modest amplification namely
So how big thumb? Have a ceiling?

CodePudding user response:

Triode work in the area and the saturated zone, UBE bias can,

CodePudding user response:

On the 14th floor qq_15218069

reference response:

transistor has three states the saturation, the globe, amplifier, saturated deadline for switch state, namely the three state is depends on the base current, base current is too small, so that as the is too big, modest amplification namely
So how big thumb? Have a ceiling?

associated with the amplification coefficient of transistors, for example, your power supply voltage is 5 v, you on the transistor collector series resistor is 1 k Ω, then the largest collector current is 5 mA, if amplification coefficient is 50, so when the base current exceeds 0.1 mA, transistor in saturated zone,

In actual design, there will be a certain margin, that is to say, base current will be designed for several times, guarantee the deep saturated,

CodePudding user response:

DC, are generally used to control DC

CodePudding user response:

Dc, the switch also pull what exchange

CodePudding user response:

Direct current (dc),
Conduction and closed state, depends on BE a current or voltage of real value,
You use alternating current (ac), is between conduction and close the switch.

CodePudding user response:

Do switch, personally recommend using MOS tube,

About the MOS switch tube do, may refer to https://mp.weixin.qq.com/s/yaAGuLq8SWyFAWLy5feJrQ

CodePudding user response:

Dc current direction of fixed to open

CodePudding user response:

NPN in b level to high level and then open, low level shut up, instead of PNP

CodePudding user response:

Is not to say that the ac dc, only need to meet as a condition of saturated zone would conduction, such as push-pull circuit, its input side is communication, ordinary DIDO is to make the chip output a level, can be regarded as a dc,

CodePudding user response:

According to the requirements of circuit, circuit you what does it do

CodePudding user response:

Pass by to see see!!!!!!!!!!

CodePudding user response:

Look at the situation application

CodePudding user response:

Direct current (dc) should be

CodePudding user response:

Direct current (dc), don't want to

CodePudding user response:

Can't say that,
Because alternating current (ac) in our country is characteristic of the frequency of 50 hz, waveform is sine wave power electricity,
It should be said that doing the switch triode, can enter the high level, also can input low level; Can input square-wave already, also can enter other waveform, depending on the specific need,

CodePudding user response:

When the signal switch Ic, simple say Vbe> 0.7 V, triode conduction; Vbe<0.7 V line break, only for NPN and PNP transistor is negative pressure, in the same way,
Do power transformation needs to consider the current magnification,

CodePudding user response:

Direct current (dc), the conversion between two workspaces,

CodePudding user response:

In switching power supply, power switch triode do to use, control signal is a square wave signal,

CodePudding user response:

Are dc or pulse

CodePudding user response:

Simple for example, a switch triode do this example from the MCU peripheral circuit, see below
When pA6 as low electricity at ordinary times, triode conduction, buzzer rang for high power triode conduction, at ordinary times is equivalent to a switch

CodePudding user response:

Direct current (dc) big brother