Explain a common emitter configuration without a feedback, Electrical Engineering

Assignment Help:

Q. Explain a common emitter configuration without a feedback.

A simple common emitter transistor amplifier--having no negative feedback--is not an ideal amplifier. This is because of the variability of gain from one transistor to another:

making uniform gain, from amplifier to amplifier is impossible. Also, without feedback some amplifiers--having transistors with excessive gain--might be unstable and prone to be oscillate, as well as, poor signal to noise and distortion ratios ;low input impedance (poor impedance matching between stages, etc), and susceptibility to temperature extremes. Without negative feedback, high ambient temperatures can raise the operating point, thus heating the device further; ending with this positive (thermal) feedback, bringing on the transistor's permanent failure.

205_Explain a common emitter configuration without a feedback.png

When (negative) feedback is introduced, most of these problems diminish or disappear, resulting in improved performance and reliability. The amount of feedback is dependent on the relative signal level dropped across this resistor, e.g., if the resistor value approached that of the collector load resistor, the gain would approach unity (Gv ~ 1).


Related Discussions:- Explain a common emitter configuration without a feedback

Lhld load hl pair direct instruction, LHLD  Load  HL Pair Direct  Instru...

LHLD  Load  HL Pair Direct  Instruction This  instruction is used to copy the  content  of memory  location specified  by opened  in register L  and copy the content of next  m

Explain quantizing analog signals, Explain Quantizing Analog Signals? ...

Explain Quantizing Analog Signals? A common analog-to-digital conversion pipeline contains a spectrum limiter (a simple low-pass or bandpass filter), a sample and hold circuit

Differentiator.., in case of a differentiator will the amplitude rise or fa...

in case of a differentiator will the amplitude rise or falls?

Why ce configuration is widely used in amplifier circuit, Q . Why CE Config...

Q . Why CE Configuration is widely used in amplifier circuit? The main utility of a transistor lies in its ability to amplify weak signals. The transistor alone cannot perform

Explain significance of loss tangent of dielectric material, Explain the si...

Explain the significance of the loss tangent of a dielectric material. The loss tangent contains a very small value for free space. For solid materials there tan δ = 0.003, tha

Find the current by means of mesh-current analysis, For the network shown i...

For the network shown in Figure, find the current delivered by the 10-V source and the voltage across the 3- resistor by means of mesh-current analysis.

Explain the asynchronous up-down counters, Explain the Asynchronous Up-Down...

Explain the Asynchronous Up-Down Counters? In some applications a counter must be able to count both down and up and the circuit below is a 3-bit up-down counter. It counts do

Describe watch dog timer and reaction timer, a. Given a timer with a termin...

a. Given a timer with a terminal count and a clock frequency of 10 MHz measure the following: (i) Range & Resolution (ii) Terminal count values needed to measure 3ms interval

How is 8255 (programmable peripheral interface) configured, How is 8255 (Pr...

How is 8255 (Programmable Peripheral Interface) configured if its control register contains 9B h. Ans. Programmable Peripheral Interface Command Byte B (sets or

Explain digital control systems, Q. Explain Digital control systems? Si...

Q. Explain Digital control systems? Significant progress has been made in recent years in discrete-data and digital control systems because of the advancesmade in digital compu

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