Fixed-Bias Configuration of a Transistor

Analog Electronics: Fixed-Bias Configuration
Topics Covered:
1. Calculation of input current in fixed-bias circuit.
2. Calculation of output current in fixed-bias circuit.
3. Calculation of output voltage in fixed-bias circuit.
4. Numerical problem.
Series Diode Configuration (Examples) : • Series Diode Configura...
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In the example problem shown in the video, while calculating Rc why cant we use the ohm's law since Vc and Ic are known and only Rc should be found. Is there any wrong if use this or whether its a rule to solve by KVL

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Is AC signal does combine with DC through base and collector?

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Sir, in the example that you take of finding the Rc...In which you take Vce equals to Vc.....so can we find the Vce first and then Rc??

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[@ankitpaudel]

Sir is ic equal to beta ib valid for each and every ib or ic gets saturated after keeping vcc constant and increasing in by increasing vbb.

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[@KILOMIKE86]

Kindly explain how we get 3.2 mA as IC for part (a) post multiplication of values of IB and Beta. Regards

[@MrTheFitt]

sir? is the value of the current in the emitter is equal to the current of the collector or is it zero?

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[@pulkitsharma8314]

Is biasing is done at operating point ??
If not then is there any relation between operating points and biasing??

[@jsem_ayush]

If the capacitors act as open circuits then what is the use of them in the circuit ? i/p signal will not be transmitted through the open circuit.

[@MM-ei7xv]

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[@piroagent1072]

please one question
derive an expression for collector current and collector to emitter voltage for fixed biased PNP transistor?

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Sir, in dc analysis why don't we use transient analysis at capacitor.

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For the (c part) why do we apply kvl till 6v only??why not till Vce??

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Sir Can you tell me How Can i get VB (Base Voltage) VC(Collector) VE(Emitter) ? ?

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What is the current that flows in circuit where the output is taken ?

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How the collector base junction is reverse biased?

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sir why we use capicitors across its terminals???

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To filter out the DC component in a Signal ....only AC will pass through Capacitors

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please upload a video of amplifier circut design with resistence Re(emitter resistence) connected
serise bias confoguration of transistor

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Why do we use resistor Rc connected to Collector?

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thank u

[@akarshsatyajonna4871]

Sir why we are using coupling capacitors?

[@027_vivek8]

sir,why we write fixed potential as vcc

[@sheraj_physics8118]

1.Why it is called "fixed bias/base bias"?
2.How the collector base junction is reverse biased by Vcc?
3.Why base to emitter potential is equal to the barrier voltage?why not more than that?

[@dhirajkumarsahu999]

1. Base current IB is fixed. Therefore, this type is called the fixed bias type of circuit.
2. CB junction will be reverse biased if the voltage drop at the collector terminal with respect to ground will be more than the voltage drop at the base terminals with respect to the ground. and this voltage drop depends on the values of resistors connected to the collector and the base terminals. Hence, we should choose the value of the resistors accordingly.
3. It is because the base to emitter junction is forward biased in active mode and acts like a PN diode in forward bias.

[@ankitsrivastava8023]

Thank you to both @dhiraj and @mohtasir

[@bikramkesharibehera1747]

What is stability factor of fixed bias transister?

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How stabilization is done?

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Sir,Why the circuit has been connected like this ?and what is the main purpose of this fixed biasing?

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What is copling capcitor

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[@bhanutejacs3454]

Sir how is it named VCC when it is connected to base also?

[@biplobchanda5905]

if i use Vce=Vcc-IcRc for the last answer why it's not match with the answer and why we don't use this rule for the last example Vce

[@learninghome5396]

In the very first loop why we neglected the saturation current.???

[@kapilsamanta6108]

Capaciter is a part of
Fixed biased circuit ??

[@krishnagodugunuru7836]

sir u did great job but i could not understand how u relate this Ib current and Vce voltage

[@krishnagodugunuru7836]

please reply for this]

[@HariKrishnan-fb5jr]

That is because of early effect phenomenon

[@kritika_deshmukh]

krishna godugunuru In CE configuration, Ib is the i/p current and Vce is the o/p voltage..so obviously they are related ..early effect is there na..clear ur concepts.☺

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