BEEC imp topics.pdf

UNIT-I  Ohm’s Law  Active elements, Passive elements  Voltage and current sources  Kirchhoff’s current and voltage laws  Voltage division and current division laws.  Superposition, Thevenin’s and Norton’s Theorems  Analysis of simple circuits. UNIT-II ...

UNIT-I  Ohm’s Law  Active elements, Passive elements  Voltage and current sources  Kirchhoff’s current and voltage laws  Voltage division and current division laws.  Superposition, Thevenin’s and Norton’s Theorems  Analysis of simple circuits. UNIT-II  Average, RMS and Peak values  Expressions for average value, RMS value, peak value, form factor for a sinusoidal waveform  Real power, reactive power, apparent power, power factor  Analysis of single-phase ac circuits consisting of RL, RC, RLC combinations (series only)  Three phase balanced circuits - voltage and current relations in star and delta connections  A coil of resistance 12Ω and inductive reactance of 25Ω is connected in series with a capacitive reactance of 41Ω. The combination is connected to a supply of 230V, 50 Hz. Using phasor algebra, find (i) circuit impedance (ii) current and (iii) power consumed. UNIT-III  PN Junction Diode: working, V-I Characteristics and applications  Rectifiers: o Half wave rectifier o Full wave rectifier o Bridge rectifier  ripple factor, percentage regulation, TUF and efficiency calculations  Comparison between Halfwave, full wave and bridge rectifiers  FWR with capacitive filter  HWR with capacitive filter  Zener diode as voltage regulator  CRO-block diagram and applications  PN Junction Diode Vs Zener diode  Avalanche breakdown Vs Zener breakdown UNIT-IV  Transistor-construction and working (npn / pnp)  Differentiate between NPN and PNP transistor construction and operation  Configurations of BJT (CB, CE, CC) o Working and i/p and o/p characteristics  Early effect  Comparison of CE, CB, CC configurations  Relation between α, β, γ  hybrid parameters  Construction and working of JFET  Drain and transfer characteristics of JFET  Define Pinch off voltage in JFET UNIT-V Feedback amplifiers:  Types of feedback amplifiers  Compare feedback amplifiers  Advantages of negative FB amplifiers  Derivation of Rif and Rof for o Current shunt feedback amplifier o Voltage shunt feedback amplifier o Current series feedback amplifier o Voltage series feedback amplifier OPAMPs:  Pin diagram of OPAMP  Block diagram of OPAMP  What are the characteristics of OPAMP? Ans: DC Characteristics o Input offset voltage o Input offset current o Input bias current o Thermal drift AC Characteristics o Gain Bandwidth Product o Rise time o Slew rate o Full-power response o AC noise  List out ideal characteristics of OPAMP. Ans: o Infinite voltage gain o Infinite input impedance o Zero output impedance o Infinite bandwidth o Zero input offset voltage (i.e., exactly zero out if zero in).  Inverting & Non inverting amplifiers  Adder  Integrator, Differentiator Oscillators:  Barkhausen criterion  Classification of oscillators  Operation of Wien Bridge Oscillator  Operation of Crystal Oscillator  Operation of RC Phase shift Oscillator