Derive the equations of the self bias circuit, Electrical Engineering

Q. Derive the equations of the self bias circuit?

A circuit which is used to establish a stable operating point is the self biasing configuration. The circuit is shown in Fig

2260_Derive the equations of the self bias circuit.png

The physical reason for an improvement in stability with the circuit is the following:

If Ic increases or tends to increase because Ico has risen as a result of the elevated temperature, the current in Re increases. As a result of the voltage drop across Re the base current is decreased. Hence Ic will increase less than it would have, had there been no self biasing resistor Re.

Kirchoffs voltage law around the collector circuit yields

-Vcc + Ic (Re+Re) + Ie.Re+ Vce = 0

Kirchoffs voltage law around the base circuit is

V = Ie.Re+Vbe+(Ib+Ic)Re.

Hence in the active region the collector current is given by

Ic=bIb+(1+b)Ico.

Posted Date: 6/11/2013 2:11:15 AM | Location : United States







Related Discussions:- Derive the equations of the self bias circuit, Assignment Help, Ask Question on Derive the equations of the self bias circuit, Get Answer, Expert's Help, Derive the equations of the self bias circuit Discussions

Write discussion on Derive the equations of the self bias circuit
Your posts are moderated
Related Questions
Explain Soft ferrites and their applications. Soft ferrites and their applications: Such are non- metallic compounds having ferric oxide and one or two bivalent metal oxides as

Revenue Loss Due to Loss of Opportunity to Serve The revenue loss because of "loss of opportunity to serve" is a extremely relevant but less visible aspect of revenue loss. Gu

applications of heterodyne wave analyzer

Explain Corrosion. Corrosion: The process of constant eating (or destruction) up of metals (by the surface) by the surrounding is termed as corrosion. These metals are corroded

design a single phase circuit from a supply point to a load

Q. Define Number Systems? A number system, in general, is an ordered set of symbols (digits) with relationships defined for addition, subtraction, multiplication, and division.

Q Determine the effective input noise temperature of a long piece of waveguide (that connects an antenna to a receiver) with a loss of 3.4 dB at 12 GHz and a physical temperature o

1- Use 4-to-16 decoder and some residue gates to recognize the following functions F1(A,B,C)= S(1,2,4,5,7) F2(A,B,C,D)= S(1,2,4,5,7,10,12,14,15) F3(A,B,C,D,E)= S(1,2,4,5,7,10,12,1

Q. Referring to Figure, let V BN = V RN = 120 V rms magnitude, and V BR = 240 V rms magnitude. Write down expressions for v BN (t), v RN (t), and v BR (t), and sketch them as a

Latch A 8 bit  latch comprises of transparent latch D flip  flop. It is commonly  used  to interface output  device with  microprocessor. A typical example of such 8 bit  latc