Electronics I

IIT Delhi Course , Prof. D.C. Dube

Lecture 1: P-n diode

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Lecture Details :

Electronics by Prof. D.C. Dube, Department of Physics, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in

Course Description :

p-n Diode : n- and p- semiconductors. p-n junction formation. Junction properties: contact potential, junction capacitance. Currents in forward and reverse biased junction. Junction Breakdown. Zenor Diode.

Transistor (BJT) : Transistor in equilibrium (no external bias). Transistor with external bias, Transistor Action. Efficiency Factors. Common Base, Common Emitter, Common Collector Configurations, I-V Characteristics; Bias and Bias Stability. Various biasing Schemes/circuits and Analysis.

Small Signal BJT Amplifiers : h- parameters: Hybrid model for transistor amplifiers. Expressions for amplifier performance parameters in terms of h-parameters; r-parameters: Expressions for amplifier performance parameters in terms of r-parameters.

Feedback and Frequency Response in Amplifiers : Negative and Positive feedbacks. Negative feedback Networks. Desired modifications in amplifier circuits using negative feedback. Changes in input, output impedance levels, band width etc.: Frequency Response, Coupling Methods, Multistage amplifiers.

Field Effect Transistors (FETs) : Junction field effect transistor (JFET), MOSFETs : Depletion MOSFET, Enhancement MOSFET; Biasing of MOSFETs. Small signal parameters. Common Drain, Common source and common gate amplifiers. Small signal analysis. FET constant current source. MOSFET as a register, MOS Capacitor, CMOS Circuits.

Power Amplifiers : Classification of power amplifiers. Class A amplifiers. Power efficiency etc.:;Class B push-pull amplifiers. Signal distortion in class B amplifiers. AB operation. Biasing for AB push-pull amplifier. Performance characteristic; Class C- power amplifiers and their characteristics; MOSFET power amplifiers.

Differential and Operational Amplifiers :
Differential amplifiers: Inverting and non-inverting inputs. Various modes of operation.
Operational amplifiers ( Op amps): Op amp characteristics and specifications. Inverting and non-inverting amplifiers and their analysis; Summing, Scaling and Average amplifiers. Integrators and differentiators. Log amplifier etc. Active filters.

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