Voltage divider with ac bypasses capacitor, Electrical Engineering

Assignment Help:

Voltage divider with AC bypasses capacitor:

2419_Usage of voltage divider bias.png

Figure: Voltage divider with capacitor

The standard voltage divider circuit that is discussed above faces a drawback - AC feedback caused through resistor RE reduces the gain. This can be prevented by placing a capacitor (CE) in parallel with RE, as displayed in circuit diagram.

This capacitor is generally selected to have a low enough reactance at the signal frequencies of interest such that RE is necessarily shorted at AC, so grounding the emitter. Hence feedback is only present at DC to stabilize the operating point, in which case any AC benefits of feedback are lost.

Certainly, this idea can be employed to shunt only a portion of RE, hence retaining some AC feedback.


Related Discussions:- Voltage divider with ac bypasses capacitor

Determine the laplace transform of the given functions, Q. Determine the La...

Q. Determine the Laplace transform for each of the following functions from the basic de?nition of Equation. (a) f 1 (t) = u(t) (b) f 2 (t) = e-at (c) f 3 (t) = df (t) dt,

Show the dialling circuit, Q. Show the Dialling Circuit? Dialling circu...

Q. Show the Dialling Circuit? Dialling circuit enables subscriber to output signals representing digits, and this enables caller to enter destination telephone number. Dialling

Impedance diagram of per uint values, explian briefly with in diagram and n...

explian briefly with in diagram and numerical examples

Power and power distribution, design a single phase distribution circuit fr...

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

Problem of current electricity, charges of +2q and -4q are fixed a distance...

charges of +2q and -4q are fixed a distance d apart as in figure_2(a).find electric field at the point A ,B and C (b) sketch roughly the electric field lines.

Assignment question , An audio amplifier with feedback needs gain of approx...

An audio amplifier with feedback needs gain of approximately 500 in a 3-dB bandwidth extending from 60 Hz to 25 kHz. Assume this is accomplished using a feedback network with ß=0.0

Define the term paging unit, Define the term Paging Unit. Paging Unit:...

Define the term Paging Unit. Paging Unit: The paging mechanism functions along with 4K - byte memory pages or along with a new extension obtainable to the Pentium with 4M byt

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