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

Factors affecting frequency response of an amplifier, Q. What is their rela...

Q. What is their relation with gain? What are the factors affecting frequency response of an amplifier? Some amplifiers should be "flat" across a band of frequencies. In other

Advantages and disadvantages of rc coupled amplifier, Q. Advantages and Dis...

Q. Advantages and Disadvantages of rc coupled amplifier? Advantages 1. Aids excellent frequency response.The gain is constant over the audio frequency range 2. It has l

Assignment, Hi, I got assignment to design a power electronic system Design...

Hi, I got assignment to design a power electronic system Design the circuit and select the appropriate components for that circuit to fulfil the requirements of the device. Regards

Explain p - type semiconductor, Explain p - Type semiconductor. p - ...

Explain p - Type semiconductor. p - Type semiconductor:- (i) If small amount of trivalent impurity is added with to a pure semiconductor giving a large no. of holes in t

What are the different types of distributing frames, Q. What are the differ...

Q. What are the different types of distributing frames used in exchanges? Ans: Different distribution  frames  used  in  exchange  are  displayed in  figure.  Each subscribe

Find the current through the diode in the circuit, Q. A diode is connected ...

Q. A diode is connected in series with a voltage source of 5 V and a resistance of 1 k. The diode's saturation current is given to be 10 -12 A and the I-V curve is shown in Find

Explain inverse discrete-time fourier transform, Explain Inverse Discrete-T...

Explain Inverse Discrete-Time Fourier Transform 1. Observe the same things among this formula and the inverse analogue Fourier transform: The (1/2π) factor The sign

Transmission, what are the grond clearance for 220KV overhead transmission ...

what are the grond clearance for 220KV overhead transmission lines?

Instruction set architecture, assume that the top of the stack in the progr...

assume that the top of the stack in the program is pointed by the register sp.

Given a system; how to find feedback, I am working on Vision based vehicle ...

I am working on Vision based vehicle lane keeping control system. I have uploaded two images at http://tinypic.com/view.php?pic=24gj85t&s=6 & at http://tinypic.com/view.php?pic=

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