Emitter bias, Electrical Engineering

Emitter bias:

596_Emitter bias.png

Figure: Emitter bias

While a split supply (dual power supply) is accessible, this biasing circuit is the very much effective, and gives zero bias voltage at the emitter or collector for load. The negative supply VEE is employed to forward-bias the emitter junction by RE. The positive supply VCC is employed to reverse-bias the collector junction. Just only two resistors are essential for the common collector stage and 4 resistors for the common emitter or common base stage.

We know that,

VB - VE = Vbe

If RB is sufficiently small, base voltage will be almost zero. Hence emitter current is,

IE = (VEE - Vbe)/RE

The operating point is independent of β if RE >> RB

Merit:

Good stability of operating point identical to voltage divider bias.

Demerit:

This type can just only be used while a split (dual) power supply is available.

Posted Date: 1/10/2013 7:28:32 AM | Location : United States







Related Discussions:- Emitter bias, Assignment Help, Ask Question on Emitter bias, Get Answer, Expert's Help, Emitter bias Discussions

Write discussion on Emitter bias
Your posts are moderated
Related Questions
coding for vehicle tracking system using gsm in avr atmega16 microcontroller


Normal 0 false false false EN-IN X-NONE X-NONE

Explain the discovery of neutron. Mention its properties. Discovery of Neutron: The existence of neutron was first predicted by Rutherford in the year 1920. But it was discov

Discuss the advantages and disadvantages of aluminium as compared to copper as a conductor of electricity. Advantages: Aluminium as a conductor of electricity as compared co

# complete working of thermal transducers

Q. Define Resistance Strain Gauge? Mechanical and civil engineers routinely employ the dependence of resistance on the physical dimensions of a conductor to measure strain. A s

Higher order  Address Bus The 8085 microprocessor  has 8 pins  dedicated to higher order address A15 - A8. These pins  are used to connect  higher  order address bus. These  p

Define Spectrum of Real Signals? In the real world, we rarely come throughout a pure sine wave. Typical signals have a wide spectrum as displayed in the above diagram. Informat

DC Load line