Write notes on clamping, Electrical Engineering

Assignment Help:

Q. Write notes on clamping ?

Clamping network shifts (clamps) a signal to a different d.c level, that is it introduces a d.c. level to an a.c signal. Hence, the clamping network is also known as d.c reference signal to the video signal. The clamping network has the various circuit components like a diode, a capacitor and a resistor. The time constant for the circuit G=RC must be large so that the voltage across the capacitor does not discharge significantly when the diode is not conducting.

In the clamper circuit the diodes are assumed to be ideal. A square waveform with maximum amplitude of V is given as the input to the network. During the positive half cycle, the diode conducts, ie it acts like a short circuit. The capacitor charges to V volts. During this interval, the output which is taken across the short circuit will be V0= 0 V. During the negative half cycle, the diode is open. The output voltage can be found out by applying Kirchoff's Law.

-V-V-V0 = 0

Therefore, V0= -2V

The analysis of the clamper circuit can be done as follows. Determine the portion of the input signal that forward biases the diode. When the diode is in short circuit condition, the capacitor charges up to a level determined by the voltage across the capacitor in its equivalent open circuit state. During the open circuit condition of the diode, it is assumed that the capacitor will hold on to all its charge and therefore voltage. In the clamper networks, the total swing of the output is equal to the total swing of the input signal.


Related Discussions:- Write notes on clamping

Find the net force experienced by a positive charge, Q. Two charges of equa...

Q. Two charges of equal magnitude 5µC but opposite sign are separated by a distance of 10 m. Find the net force experienced by a positive charge q = 2 µC that is placed midway betw

Motor, operation of induction motor

operation of induction motor

Auto transformer, winding turns of 415v step down transformer on 50%, 60% &...

winding turns of 415v step down transformer on 50%, 60% & 80% tapping

Explain the modes of connection for polyphase transformers, Discuss the mod...

Discuss the modes of connection for polyphase transformers Discuss with aid of electrical grouping and wiring connection diagrams the different types of connections for polypha

Show example on residential wiring, Q. A person, while driving a car in a c...

Q. A person, while driving a car in a cyclone and waiting at an intersection, hears a thumping sound when a power line falls across the car and makes contact with the chassis. The

Signals and system, how can i calculate that is following signal is periodi...

how can i calculate that is following signal is periodic or not? X[n]= ?_(k=-8)^8¦?{d[n-4k]-d[n-1]-4k]}?

Evaluate the diode current id, Question: (a) The piecewise linear appro...

Question: (a) The piecewise linear approximation given in Figure is assumed for the diode in the circuit shown in Figure. Evaluate the diode current ID. (b) The piecew

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