Explain the fixed bias circuit, Electrical Engineering

Assignment Help:

Q. Explain the fixed bias circuit?

          The Fig refers to the common emitter collector characteristics and the ac and dc load lines.The Fig shows the points Q1 and Q2 which refers to the operating point at the middle of the dc load line and the point which gives as large as an output possible without too much distortion respectively.

769_Explain the fixed bias circuit.png

 

Biasing is usually done to prevent thermal runaway which damages the transistor permanently. One kind of biasing is the fixed bias circuit.

Analyzing the input loop of the circuit by KVL

Vcc=IbRb + Vbe.

Ib=(Vcc-Vbe)/Rb.

Ic=bIb.

Analyzing the output loop of the circuit by KVL.

Vcc=Ic+Vce

Vce=Vcc-Ic.Rc.

Hence through the input and output loop we have calculated the output current(Ic) and output voltage (Vce).

The current Ib is constant and the network in the dig 2 is called the fixed bias circuit.

In summary we see that selection point Q depends upon a number of factors. Among these factors are the ac and dc loads of the stage the available power supply the maximum power ratings, the peak signal excursions to be handled by the stage and the tolerable distortion.


Related Discussions:- Explain the fixed bias circuit

Obtain a pos expression, Q. The K map of a logic function is shown in Figur...

Q. The K map of a logic function is shown in Figure. (a) Obtain a POS expression and its corresponding realization. (b) For the purpose of comparison, obtain the correspondin

Use of monitoring and control in nuclear and chemical plants, Use of Monito...

Use of Monitoring and control in nuclear and chemical plants In nuclear and chemical plants, there is generally a combination of control and monitoring taking place. Informatio

Machine, function of a commutator in a DC motor

function of a commutator in a DC motor

Explain intrinsic semiconductor, Explain Intrinsic Semiconductor. Intr...

Explain Intrinsic Semiconductor. Intrinsic Semiconductor: An extremely pure semiconductor is termed as intrinsic semiconductor. But at absolute zero temperature its valence b

Determine frequency of rotor current, A 3 phase, 6 pole induction motor is ...

A 3 phase, 6 pole induction motor is rated at 400hz, 150v, 10h.p., 3% slip at rated power output. The windage and friction loss is 200w at rated speed. With the motor operating at

Matlap program, howw to plot amper circuital law through matlap

howw to plot amper circuital law through matlap

Autotransformer, conversion of auto transformer in to winding transformer a...

conversion of auto transformer in to winding transformer and vice versa

Illustrate working of application layer, Q. Illustrate working of Applicati...

Q. Illustrate working of Application Layer? As the highest layer in OSI reference model, application layer provides services to users of OSI environment. Layer

Explain fet amplifiers, Explain FET amplifiers? Just like the BJT ampli...

Explain FET amplifiers? Just like the BJT amplifiers, FET amplifiers are constructed in common-source (CS, analogous to CE), common-drain (CD, analogous to CC), and common-gate

Explain circuit with capacitive load, Circuit with capacitive load Capa...

Circuit with capacitive load Capacitors which obey the relationship of equation are linear capacitors, since the potential difference among the conductive surfaces is linearly

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd