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

Show power and power factor in ac circuits, Q. Show Power and Power Factor ...

Q. Show Power and Power Factor in ac Circuits? Power is the rate of change of energy with respect to time. The unit of power is a watt (W), which is a joule per second (J/s). T

Constant frequency system, Constant Frequency System In this  system c...

Constant Frequency System In this  system chopping period  T is kept constant but the  on time T om is varied. This  system is also referred to pulse with modulation or time

Determine the expression for strain energy, A 3.2m long bar of 16mm in diam...

A 3.2m long bar of 16mm in diameter hangs vertically and has a collar attached at the lower end calculate the max. stress induced when a weight of 80 kg falls fromaheight of 32mm o

Gis database, GIS database:  In a nutshell, we could say that the GIS ...

GIS database:  In a nutshell, we could say that the GIS technology integrates general database operations (data query and statistical analysis), along with the unique a

Atomic structure, State the postulates of Bohr''s atomic model. Write any ...

State the postulates of Bohr''s atomic model. Write any three merits and demerits.

Basic principles of electromechanical energy conversion, Q. Basic principle...

Q. Basic principles of electromechanical energy conversion? Energy available in many forms is often converted to and from electrical form because electric energy can be transmi

Explain bound instructions in 8086 family, Explain BOUND instructions in ...

Explain BOUND instructions in 8086 family with example and their effect on flag. BOUND: The BOUND instruction, that has two operands, compares a register along with two word

Transistors, how fet transistor works in self bias

how fet transistor works in self bias

Analyse the characteristics of a dc machine, Theoretical calculations T...

Theoretical calculations The characteristics of the d.c. machine you will be investigating are given on the last page of this part. Use 200V DC supply for both armature and fie

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