What is need of wave shaping circuit ?

1 Answer

Answer :

In electronics application, it is often needed to alter the shape of wveform like cutting off positive or negative portion of wave,generation of one wave from other,holding wave at some dc level etc.To do this waveshaping circuits are needed.

Related questions

Description : State the necessity of wave-shaping circuit.

Last Answer : 1. To limit the voltage level of the waveform to some present value. 2. To shift the waveform to a particular voltage level. 3. To generate one wave from the other. 4. To cut the negative and positive portions of the waveform.

Description : Define linear and non-linear wave-shaping circuit.

Last Answer : Linear wave-shaping circuit  The circuit which makes use of only linear circuit elements is known as linear wave shaping circuits. Resistor, capacitor, inductor are used for the circuits. E.g. ... , transistor, resistors and capacitors etc. are used for the circuits. E.g. Clipper, Clamper

Description : Compare linear and nonlinear wave shaping circuits.

Last Answer : Sr. No. Linear Wave shaping Circuit Non Linear Wave shaping Circuits 1 The circuit which makes use of only linear circuit elements is known as linear wave shaping circuits. The circuit which ... for the circuits 4 E.g. Integrator, Differentiator E.g. Clipper, Clamper

Description : Draw the circuit diagram of shunt capacitor filter along with full wave rectifier. Draw the waveform of full wave rectifier output and shunt capacitor filter output.

Last Answer : Fig: Shunt capacitor filter along with full wave rectifier Fig: Waveform of full wave rectifier output and shunt capacitor filter output.

Description : Draw circuit diagram and waveforms for centre-tap full wave rectifier.

Last Answer : Circuit Diagram:    

Description : State the condition for RC differentiator. Draw the output waveform of RC integrator for square wave input.

Last Answer : Condition for RC differentiator: If the time duration T of the input waveform is comparable with the RC time constant (product of R and C) then the output waveform of the differentiator gets distorted. Hence for proper differentiator the condition is as follows: T >>RC

Description : Draw and describe working of full wave rectifier using centre tapped transformer.

Last Answer : Full wave Rectifier with Center tapped transformer(FWR): In full wave rectification, the rectifier conducts in both the cycles as two diodes are connected. Circuit diagram: Operation: 1. In ... both half-cycles of input AC voltage. Therefore DC is obtained across the load RL.

Description : Compare half wave rectifier and full wave rectifier. 

Last Answer : half wave rectifier and full wave rectifier :

Description : Draw the circuit diagram of bridge rectifier and label it. 

Last Answer : Circuit Diagram Bridge rectifier

Description : Draw the clipper circuit using series and shunt diode.

Last Answer : Fig: A series negative clipper (OR) Fig: Series positive clipper Fig: Parallel positive clipper (OR) Fig: Parallel negative clipper

Description : With help of circuit diagram and waveform, explain working of positive series clipper.

Last Answer : Series Clipper (Positive):-   Working: For positive cycle the diode D is reverse biased. Hence there is no voltage across the load RL While for negative half wave, the diode D is forward biased. Hence ... positive cycle of the input voltage gets clipped off. Input & o/p wave form:-   

Description : With help of circuit diagram and waveform, explain working of CLC or π- filter.

Last Answer : Circuit diagram CLC or Π filter:   Working : It consist of a filter capacitor C1 connected across the rectifier o/p , a choke L is series and another filter capacitor C2 connected across the load. ... to block. Therefore, only d.c component appears across the load and that is what we desire.  

Description : With help of circuit diagram and waveform, explain shunt capacitor filter.

Last Answer : Circuit diagram and Waveform: OR Explanation: A filter circuit is one which removes the ac component present in the rectified output and allows the dc component to reach the ... which allows ac components. The remaining dc components present in the signal are collected at the output. 

Description : Draw RC differentiator circuit.

Last Answer : RC differentiator circuit :

Description : Define (i) Open circuit (ii) Short circuit.

Last Answer : Open circuit : An electrical circuit is said to be open,when any part of conducting path is open or broken and there is no continuity in the conducting path of an electrical circuit. Short circuit : An electrical circuit is said to be short,when voltage source has closed path across its terminal.

Description : Explain with neat circuit, concept of open circuit and short circuit.

Last Answer : Open Circuit  Two points in a circuit are said to be open circuited if there is no circuit element or direct connection between them. An open circuit exist between points A and B in ... short circuited in below figure. The resistance between short circuited points is zero. RAB= 0Ω

Description : With the help of circuit diagram and waveforms, explain working of RC differentiator.

Last Answer : Fig: RC differentiating circuit Figure shows a RC differential circuit. It is also known as high pass filter. The reactance of a capacitor decreases with increasing frequency. The higher ... i.e. the output signal is directly proportional to the derivative of the input signal.  

Description : Describe working of negative clamper circuit with neat diagram and waveform.

Last Answer : Working: In the first positive half cycle the capacitor will charge through the forward biased diode to peak voltage Vm as shown in circuit. Charging takes place very quickly as the ... reverse biased and stop conducting. Negative clamper adds a negative DC shift as shown in waveform.

Description : Define clipper. Draw circuit of negative shunt clipper.

Last Answer : Clipper: A clipper is a device designed to prevent the output of a circuit from exceeding a predetermined voltage level without distorting the remaining part of the applied waveform. OR Clipper: An ... the positive or negative peak or both from a specific level is known as clipper.

Description : Draw and describe circuit diagram of centre tapped rectifier with LC filter along with its input and output waveforms.

Last Answer : Explanation: A centre- tap full wave rectifier drive produces the rectified voltage and it drives the LC filter. We know that the series inductor filter is preferred for low values of load resistance ( ... load RL. The output voltage waveforms are similar to that as shown in figure above.  

Description : Draw negative clamper circuit and explain its working. 

Last Answer : Diagram: Working: During the positive half cycle of the input AC signal, the diode is forward biased and hence no signal appears at the output. In forward biased condition, the diode allows ... - 2Vm} which have the same polarity with each other. As a result, the signal shifted downwards. 

Description : Give the need of rectifier. 

Last Answer : Need of Rectifiers: Many electronic devices such as diodes, transistors and IC’s works on D.C. but not on A.C. It is then needed to convert A.C. into D.C. Rectifier is the best and cheapest way to provide D.C. current for electronic devices. 

Description : State the need of Rectifier circuits.

Last Answer : The DC power supply is essential for operation of many electronic devices and circuits.This DC voltage is obtained from AC source.Rectifier circuit is important circuit for this conversion.

Description : State the need of filters. 

Last Answer :  The output of a rectifier is pulsating D.C. [i.e. it contain A.C along with D.C components]. The A.C. components are undesirable and must be removed from the pulsating D.C to obtain pure D.C. signal. To remove the ripples, filter circuit is used. 

Description : Draw construction of PVC gang capacitor and describe it’s working.

Last Answer :  Diagram Working  In plastic core capacitor, poly-vinyl chloride (PVC) type of plastic film is used as dielectric between the fixed & movable vanes instead of air. This increases ... & results in great reduction of size of capacitor in comparison with the air core capacitor.

Description : Describe construction of Aluminium Electrolytic capacitor.

Last Answer : A plain foil dry electrolytic capacitor is made by forming a coating of aluminium oxide on both sides of an aluminium foil. Two strips of aluminium foil used are then separated by two layers of porous ... is rolled up the ends closed with wax and then sealed into an aluminium container.

Description : Define rectification efficiency. Give its formula.

Last Answer : The ratio of output DC power delivered to the load to the applied input AC power is called rectification efficiency. It is denoted by η. η = Output DC power delivered to the load / Input AC power from transformer secondary η = Pdc / Pac

Description : List two applications of LDR.

Last Answer : 1. It is used for automatic contrast of brightness control in television receivers. 2. It is used as a proximity switch. 3. It is used in the street light control circuits. 4. It is used in the ... security alarms. 9. It is used in the smoke detectors. 10. It is used in the infrared astronomy.

Description : Define permeability and reluctivity of magnetic material. 

Last Answer : Permeability is the capability of a specific material to allow the flow of magnetic flux more easily. Thus higher permeability enables a material to pass more magnetic flux. Reluctivity is equal to the ratio of the intensity of the magnetic field to the magnetic induction of the material.

Description : Define following terms: i) Active networks. ii) Unilateral networks

Last Answer : i) Active networks: If a network consists of an energy source then it is called an active network. The type of energy source can be a voltage source or a current source. ii) ... direction of current through its elements in it, then the network is called as a unilateral network.

Description : Explain the working principle of slug tuned inductor.

Last Answer : The value of inductor increases, when the slug (moving coil) is moved into the coil winding and hence decreases the resonant frequency of the tuned circuit. Similarly, when the slug is moved out of the ... be varied by using movable core which can be moved up or down by using screw driver.

Description : Draw the star and delta connection. State any one conversion formula.

Last Answer : star and delta connection

Description : Explain the following terms 1. Bilateral Network 2. Linear Network

Last Answer : Bilateral Network If the magnitude of current flowing through a circuit element is not affected when the polarity of the applied voltage is changed, then the element is known as a bilateral element. ... network comprising of one or more linear number of elements is known as a linear network.

Description : Explain with neat sketch construction of PIN Diode. Draw its characteristics in reverse bias mode. 

Last Answer : Construction A PIN diode is made up of three semiconductor materials; two heavily doped P- and N- type material separated by an intrinsic (undoped) semiconductor (I) as shown in above figure ... . This advantage allows the PIN diode to process even weak signals.  Characteristics

Description : Draw the construction diagram of air core inductor. List two applications

Last Answer : Applications: i. It is used for construction of IF and RF tuning coils. ii. It is used for interstage coupling.

Description : Explain the working of TDR along with its symbol and characteristics. 

Last Answer : TDR are also called as thermistors. Thermally sensitive materials are used to manufacture thermistors. Depending on the temperature co- efficient of resistance value thermistors are classified as ... used when a drastic change in resistance is required at specific temperature. RαT

Description : State four applications of PIN diode. 

Last Answer : i. Used in rectifier circuit. ii. Used in clipping and clamping circuit. iii. Used for A.M detection. iv. Used for voltage multiplier.

Description : Draw a label diagram of ferrite core inductor.

Last Answer : Ferrite core inductor

Description : Convert the delta network into equivalent star network.

Last Answer : Delta to start network R1 = 4x6/ 4+6+2 = 24/12 =2/1= 2Ω R2 = 2x6/ 4+6+2 = 12/12= 1 = 1Ω R3 = 4x 2/ 4+6+2 = 8/12= 2/3= 0.66Ω

Description : Compare: 1. Active and passive network 2. Linear and non-linear network

Last Answer : 1. Active network and passive network. Sr.No Active network Passive network 1 If a network consists of an energy source, then it is called as an active network. If ... only to the linear networks.  The superposition theorem also is not applicable to the nonlinear networks.

Description : Compare clipper and clamper

Last Answer : Sr. No Parameter Clipper Clamper 1 Components used Diode, Resistors  Diode, Capacitors, Resistors 2 Function To remove a part of input waveform To add a DC ... Application Diode clamp, wave shaping circuits  Voltage Multipliers  5 Configuration

Description : Explain the colour coding using colour band system in capacitor with an example.

Last Answer : 1. First and second band gives the significant digit reading from left to right. 2. Third colour band gives the multiplier. 3. Fourth colour band gives the tolerance value. 4. Fifth and sixth bands ... , Violet, Yellow To find : Value of capacitor Solution: Yellow: 4  Violet: 7

Description : Write the function of C and L in π filter and write two advantages of π filter over other filters.

Last Answer : The capacitors C1 and C2 provide a low reactance path for the ripple whereas the series inductor L provides a high reactance to the ac ripple. The combined effect of this is the reduction in ripple, and ... very low. 4. High dc voltage (approximately Vm) 5. Increase in the average load voltage. 

Description : List four specifications of zener diode or P- N junction diode.

Last Answer : Specifications of zener diode: 1. Zener voltage 2. Power dissipation 3. Maximum power dissipation PD(max) 4. Breakdown current 5. Dynamic resistance 6. Maximum reverse current. (OR) ... Reverse saturation current 5. Power dissipation 6. Junction temperature 7. Peak inverse voltage (PIV)

Description : Draw the constructional diagram of iron core inductor and write the working of it.

Last Answer : Iron core inductors allow high inductance value but are limited in high frequency capacity due to hysteresis and eddy current losses. Iron core increases the magnetic induction of a ... certain point this result in a useful increase in inductance. Beyond that point, inductance decreases.

Description : Write four specifications of capacitor. Write the range of values for any one type of capacitor.

Last Answer : Specifications of capacitor are: i. Working voltage ii. Capacitive reactance iii. Dissipation factor iv. Frequency characteristics v. Equivalent series resistance vi. Quality Factor vii. Tolerance Electrolytic capacitor= 0.47μF to 10,000μF

Description : Write two applications of P-N junction diode and zener diode. 

Last Answer : Application of P-N junction diode: Used in rectifier circuit Used in clipping and clamping circuit. Used for A.M detection Used for voltage multiplier. Application of Zener diode: It is ... . Used in protection circuits for MOSFET. Used in pulse amplifier. Used in clipping circuits.

Description : State two functions of slug- tuned inductor and write the expression of self-inductance.

Last Answer : It is kind of variable inductor. The value of inductance increases, when the slug is moved into the coil winding and decreases the resonant frequency. When the slug is moved out of the coil ... decreases and resonant frequency of the tuned circuit increases. Self-inductance (L)= N x φ /I

Description : Define Ferromagnetic materials. Draw B- H Curve.

Last Answer : Ferromagnetic materials: The materials which possess magnetism in the absence of applied magnetic field is known as ferromagnetic materials.

Description : State the working principle of LED and LASER diode.

Last Answer : LED  Working principle of LED diode:An LED emits two light when electrical energy is applied to it.LED is a two terminal device.The terminals are named as anode (A) and the other as cathode(K). A ... with light: 1) Light absorption 2) Spontaneous emission 3) Stimulated emission