A transistor is a semiconductor device used to ….. or….. electrical signals and power.

what is the type of those transistors respectvly?

Tell me the image

IC≈…

VBE=…

@base

IE=

ß=

Alpha(α)=

Remember this

ICEO (the collector-to-emitter current with the base leg open) =

.•. IB≈0

Because ……..

Remember this

What happens in the saturation region of a BJT?

Explanation: In the saturation region of a Bipolar Junction Transistor (BJT): 1. Both the base-emitter junction and the base-collector junction are forward-biased.

2. The transistor conducts heavily, and the collector current (Ic) reaches its maximum value, limited primarily by the external circuit.

3. The transistor is "fully on," acting like a closed switch.

Tell me the relation that connects Alpha with Beta

Various types of general-purpose or switching transistors:

(a) ……

(b) …..

(c) ….

What is the cutoff region in a BJT common-emitter configuration?

A) The collector current is at its maximum

B) The base current is zero

C) Both junctions are forward-biased

D) The collector-emitter current is very high

The common-collector configuration is used primarily for impedance matching purposes since it has a …. input impedance and …. output impedance,

opposite to that of the common-base and common-emitter configurations.➢ The output characteristics of the common-collector configuration are the same as for the ……. configuration

And used for impedance isolation and signal amplification

What does a transistor tester measure?

Q point is consder ….

Type one of question part one

1. What is the type of this circuit 👇👇

2. And what is the value of VE in it

3. What is the purpose of c1?

Remember this

= -12+IBx240x1000+0.7=0

.•. IB=✔️

= -VCC+ICxRC+VCE=0

= -12+(2.35x10^-3)x2.2x1000+VCE=0

.•. VCE=✔️

Note very important

In saturation point ic=0

And in cutoff

REMEMBER THIS ANSWRS ARE Q POINT

1. Q point changing represented by ……

Type one of question part two

What is the value of X from the opposite figure 👇👇

1. VCC

2. IC saturation (sat)

3. At sat VCE =….

4. So RC =….

5. IBQ=…..

Type Two of question

1. What is the type of this circuit

   Tell me IB and VC and VE (when write one symbol means the symbol and the ground)

Type three of question

1. What is the type of this circuit and solve this👇👇 by Exact method

Tell me what is the IB

_____________________________

1. Solve same question by using approximatemethod but Tell me the condition law which tell you if you can solve it by this method or not

In class A amplifier

Type 1 without capacitor (we can neglect re in Av law because RE is very big than re)

Solve (a) and (b)

In class A amplifier

Type 2 with capacitor (we can not neglect re because RE =0 and we can not divide on 0)

what is the

Av

Ai

Ap

Remember very important

At saturated VCE=….

In a class …. amplifier, the transistor conducts for the full cycle of the input signal (360°) This means the transistor is always ….. and It’s set in the middle of the load line to allow maximum swing of the output signal without distortion.

Used in ….-power applications (typically less than 1 W)

In output

The output signal is ….. out of phase with the input signal (phase)

Class … amplifier is a type of amplifier where the transistor conducts for only half of the input signal cycle (180°). This means the transistor is "…" for the other half of the cycle.

Class B amplifiers are more efficient than Class …. amplifiers because they only draw power when there’s an …..

A disadvantage of Class B amplifiers is ….., which occurs when the input signal is near zero and neither transistor is fully conducting

1. The efficiency of a Class A amplifier is approximately:

a) 25%

b) 50%

c) 78.5%

d) 100%

1. The maximum theoretical efficiency of a Class B amplifier is:

a) 25%

b) 50%

c) 78.5%

d) 100%

A Class …. amplifier ,The transistors are biased slightly above cutoff, so they conduct for more than 180° but less than 360° of the input signal cycle.

This reduces …. while maintaining higher efficiency than Class A amplifiers.

A ….uses two transistors to handle the positive and negative halves of the input signal.

One transistor "pushes" current to the load during the positive half-cycle, and the other transistor "pulls" current from the load during the negative half-cycle.

Remember this

Efficiency of Class B Amplifier:

Choose the correct answer

FETs are:

a) Current-controlled devices

b) Voltage-controlled devices

c) Power-controlled devices

d) Frequency-controlled devices

The two major types of FETs are:

a) JFET and MOSFET

b) BJT and JFET

c) MOSFET and IGBT

d) JFET and HEMT

Which of the following are advantages of FETs over BJTs? (Select all that apply)

a) High input resistance

b) Better temperature stability

c) Smaller size

d) Higher power consumption

e) Lower cost

At the FET (ex JFET) Ig(gate)=…

Because gate-source junction is always ….

to control the channel width and drain current (ID)

And I..=I…

Very important question

In JFET

For an n-channel JFET, the gate is made of …-type material.

For a p-channel JFET, the gate is made of …-type material.

@charge

In JFET

When Vgs = 0, the channel is ….

So ID =I….

And tell me it's law

True or false?

In JFET

Vps is increased over Vp (pinch-off) voltage, the current will saturate (IDSS which it's the largest ID)

Very important

The JFETamplifiers configurations are:

1) common-source,

2) common-drain,

3) common-gate.

In JFET

What is the law of

ID

VGS

MOSFET has no ….. structure;

the gate of the MOSFET is insulated from the channel by a ….. layer.

Remember

Vth is the smallest Vgs with make the bridge

VDs is voltage of drain

Type 2 with capacitor (we can't neglect re because RE will be 0 and we can't decide on 0)

What is the main types of MOSFET?

Describe the main characteristics of Practical Op-Amp?

What is the role of RG in JFET CS amplifier circuit?(answer):