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Sunday 10:00 AM to 1:00 PM

Subject: Digital Signal Processing

Teacher Name: Mrityunjay Sir

Mritunjay Sir has an experience of about 10 years and he is providing B.Tech tuition in Delhi in all areas. He is taking B Tech coaching classes in Delhi on Tejas Engineers Academy from last 3 years.

Following is the brief of the explanation of lecture that Mrityunjay sir is giving this Sunday.

Brief Explanation of B.Tech Tuition in delhi

The field of digital signal processing DSP has grown as an important field of study both theoretically and technologically, over the last few decades. The main reason for this success of DSP in the industry is due to development and use of low cost software and hardware with exciting practical applications. DSP algorithms have given rise to new range of applications in the technological development that includes microprocessors, microcontrollers and digital signal processors. These developments have a major impact on several disciplines such as electronics engineering, computer engineering, biomedical engineering and information technology. It has become a necessity that all technologists†engineers should be familiar with digital signals and systems and basic DSP techniques so that they can use DSP in their applications.

DSP technology and its advancements have reached such a stage that without DSP, we probably cannot have digital intellect review, digital recording cd, dvd, mp3, mp4 players, instruments such as digital ecg analysers, x rays, ct scan mri medical energy system etc. without dsp, we would not have seen applications, such as voice recognition, analyzers.

Analog input signal is a signal that is normally encountered in day to day real world like current voltage. temperature, pressure, light intensity, etc. Non electrical analog signals need to be converted to electrical signals for which a transducer is required. These analog electrical signals then are passed through an analog filter that limits the frequency range of analog signals prior to getting converted to digital signals. The analog filter is also called pre aliasing filer since this filter attenuates aliasing distortion. Thus, the analog filter band limits the input analog signal. The ADC then converts it to a digital signal by sampling, quantization and coding processes. This digital signal is discrete both in time and in amplitude. The digital signal is then processed by DSP since DSP applications are primarily algorithms they are implemented in DSP processors. Processing may include low pass high pass band pass or band stop filtering or other algorithms for different applications. In fact a DSP processor unit is a special type of digital computer or it could be a general purpose digital computer, a microprocessor or an advanced microcontroller. DSP algorithms can also be implemented by software using at lab tool specifically meant for DSP.

The output of DSPx unit is a processor digital signal that depends on the type of algorithm it has been subjected to. The processed signal is then converted to an equivalent analog signal by means of a digital to analog converter DAC which will be continuous in time and discrete in amplitude. The last block of erconsutruction filter that smoothens the DACE output voltage to analog signal for real world use.

It may be noted that DSP systems basically use software, in terms of DSP algorithms implemented on a DSPx, thus providing a grea deal of flexibility, less noise interference and no signal distortion tha comes handy for several practical applications. However DSP systems still require minimum analog.

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Following are the Engineering tuitions in Delhi classes to be held on 30^th July 2015 on Tejas Engineers Academy

Subject:- Analog Electronics – 1

Time: 10 AM to 12 PM

Topics to be covered:- In this lecture we will cover Biasing stabilization of Bipolar Junction Transistor. Topics to be covered are Transistor Modes, Transistor current components, Transistor biasing configuration, Common base, common emitter, common collector and their comparison. Fixed biasing technique, DC load line, AC load line and finding Q-point, Thermal runaway, self biasing with negative feedback. This lecture will be very important if you are a GATE student or a regular engineering student having Analog electronics as the main subject. Transistor is a three terminal semiconductor device having emitter, base and collector regions. A transistor can be of two types, npn or pnp. A transistor needs to be biased before using in amplifier circuit. There are two types of biasing the transistor, fixed biasing and self biasing. In fixed biasing operating point of transistor drifts with change in temperature, this problem is known as thermal runaway. To avoid this problem we use emitter resistant to provide negative feedback. Thermal runaway can also be avoided by using bias compensation.

Subject :- Signals and Systems

Time 12 PM to 2 PM

Topics to be covered and brief explanation:

In this lecture we will cover the system and its properties. A system is a device to which we apply an input signal and as a result it produces some output signal. There can be of two types of systems, continuous time system and discrete time systems. A continuous time systems is that which takes a continuous time signal as its input while discrete time system is that which takes discrete time signal as its input and produced discrete time signal as its output. A system has about six properties. (a) Linearity :- A system is said to be linear if weighted sum of two input signals produces weighted sum of corresponding output signals. (b) Time Invariance:- A system is said to be time invariant if a time shift in the input signal produces equal time shift in the output signal. (c) Causality:- A system is said to be causal if its present output depends upon present or previous values of input only but not on future values. (d) Invertibility:- A system is said to be invertible if we are able to find the value of output signal by the knowledge of input only. (e) Static or Dynamic system:- A system is said to be static or memory less if there is no delay or advanced operation. (f) Stable system:- A system is said to be BIBO stable if a bounded input applied to its input produces bounded output.

All subject Engineering subject tuitions in Delhi are provided by Tejas Engineers Academy. We aim to provide best engineering subject tuition in Delhi and NCR. Come to Tejas Engineering Academy for all your needs of B.Tech tuitions in Delhi.

Subject : STLD or Digital Electronics, Digital Circuits and systems

Time :- 2 PM to 4 PM

Brief:-

In this lecture we will cover combinational logic circuits design, such as Half Adder, Full Adder, Multiplexers, De-Multiplexer, Decoder, Encoder etc.

A Half Adder is a circuit which is used to add two bits. It produces two outputs, Sum and Carry. Half adder circuit can be realized by taking one exclusive or gate and other and gate. Sum is the xor of both input signals while carry is logic and of both input signals. A Full adder is used to add three bits or information. It has three inputs A, B and C and two outputs Sum and Carry. Sum is the xor of A , B and C while Carry is given by Carry = AB + BC + CA. These equations are determined by first writing the truth table of full adder then solving for Sum and Carry using K – MAP.

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