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

Dynamic response of control systems, Q. Dynamic Response of Control Systems...

Q. Dynamic Response of Control Systems? The existence of transients (and associated oscillations) is a characteristic of systems that possess energy-storage elements and that a

Explain nodal analysis procedure, Nodal analysis procedure: 1.  Verify ...

Nodal analysis procedure: 1.  Verify the number of common nodes and reference node within the network. 2.  Assign current and its direction to every distinct branch of the n

Ionic bonding, Ionic Bonding Instance: NaCl. Na (Z = 11) gives u...

Ionic Bonding Instance: NaCl. Na (Z = 11) gives up the outermost shell electron of it to Cl (Z=17) atom, so the crystal is build up of ions with the electronic structure

ELECTRO MAGNETIC INDUCTION, If aluminium and copper pipes are of same lengt...

If aluminium and copper pipes are of same length and diameter ... same magnet dropped through them...in copper it takes more time to come out of other end, i myself have done this.

Find the current source, Q. Consider the circuit shown in Figure. (a) Gi...

Q. Consider the circuit shown in Figure. (a) Given v(t) = 10e -t V, find the current source is(t) needed. (b) Given i(t) = 10e -t A, find the voltage source v (t) needed.

What is transient program area, What is TPA (transient program area)? T...

What is TPA (transient program area)? The memory system is divided in three major parts: transient program area, System is and XMS that is extended memory system.

Solve the nonlinear equation and find r, Q. An interface circuit consisting...

Q. An interface circuit consisting of R 1 and R 2 is designed between the source and the load, as illustrated in Figure such that the load sees a Thevenin resistance of 50  betw

Partial derivatives - transistor hybrid model, Partial derivatives - Transi...

Partial derivatives - Transistor hybrid model: The partial derivatives are taken by keeping the collector voltage or base current constant as pointed out by the subscript atta

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