Voltage divider bias, Electrical Engineering

Assignment Help:

Voltage divider bias:

92_Voltage divider bias.png

The voltage divider is made by using external resistors R1 and R2. The voltage beyond than R2 forward biases the emitter junction. Via proper selection of resistors R1 and R2, the operating point of the transistor can be prepared independent of β. In this type of circuit, the voltage divider holds the base voltage fixed independent of base current given by the divider current is large as compared to the base current. Though, even with a fixed base voltage, collector current changes with temperature thus an emitter resistor is added to stabilize the Q-point, identical to the above circuits with emitter resistor.

In this circuit the base voltage is provided by:

VB = voltage across R2

= Vcc (R2) / (R1+R2) - IB (R1R2) / (R1+R2)

 Vcc (R2) / (R1+R2) provided IB << I2 = VB /R2

Also

VB = Vbe + IERE

For the given circuit,

1628_Voltage divider bias1.png


Related Discussions:- Voltage divider bias

MATLAB, Future scope on MATLAB in India

Future scope on MATLAB in India

Explain the synchronous up-down counters, Explain the Synchronous Up-Down C...

Explain the Synchronous Up-Down Counters? The circuit of a 3-bit synchronous up-down counter and a table of its sequence are shown below.  Alike to an asynchronous up-down count

What does the eu do, Execution Unit receives program instruction codes and ...

Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.

Transformer, What is the difference between primary and secondary winding o...

What is the difference between primary and secondary winding of transforme

Survey for designing of a cross-over circuit for loudspeaker, Crossovers ar...

Crossovers are generally used with loudspeakers having multiple drivers. Loudspeakers with single drivers are unable to cover the entire frequency range i.e from low to high freque

What is the importance of rs232-c in serial communication, What is the impo...

What is the importance of RS232-C in serial communication? RS-232 that is Recommend Standard number 232 and C is the new revision of the standard. The serial ports on main comp

What is a differentiator circuit, Q. What is a differentiator circuit? ...

Q. What is a differentiator circuit? By introducing electrical reactance into the feedback loops of op-amp amplifier circuits, we can cause the output to respond to changes in

Microcontroller - introduction to microprocessors , Microcontroller Mic...

Microcontroller Microcontroller  is also known  as computer  on a chip  this  includes basic  features of microprocessor (ALU Registers  and control circuits ) with  1 k to 2k

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