Unit 9 : Electronics

The unit electronics has got 40 periods.

1. Semiconductors, Junction diode and Solar power (10 periods)
• Semiconductors
• Intrinsic semiconductors
• Extrinsic semiconductors
• n - type
• p - type
• Junction diode
• p - n junction
• Depletion layer
• Forward bias
• Reverse bias
• Characteristic of a diode
• I - V curve of ideal diode
• I - V curve of practical diode
• Diode as a rectifier
• Half wave rectification
• Full wave rectification
• Smoothing
• Demonstration of rectification using CRO
• Diode as a switch
• Types of diodes
• Zener diode
• Voltage regulation of Zener diode
• Light emitting diode (LED)
• Photo diode
2. Transistor (12 periods)
• Bipolar transistors
• Structure and circuit symbol of npn and pnp transistors
• npn transistor circuits
• Action of a transistor
• Circuit configuration
• Common - base
• Common - emitter
• Common - collector
• Investigating the characteristics of common emitter configuration of a transistor
• Input characteristic
• Transfer characteristic
• Output characteristic
• Biasing a transistor
• Common emitter transistor amplifier
• Current amplification
• Voltage amplification
• Common emitter transistor switch
• Unipolar transistor (JFET)
• Structure of p-channel and n-channel JFET
• Action of an n-channel JFET
• Characteristics
3. Operational amplifier (06 periods)
• Operational amplifier as an integrated circuit (IC)
• Identification of pins
• Action of operational amplifier
• Characteristics of the open loop state
• Uses of operational amplifier as a voltage amplifier
• Close loop state (negative feedback)
• Golden rules I and II
• Inverting amplifier
• Non-inverting amplifier
• Uses of operational amplifier as a voltage comparator / switch
4. Digital electronics (12 periods)
• Boolean expressions and truth tables of logic gates
• AND gate
• OR gate
• NOT gate
• NAND gate
• NOR gate
• EXOR gate
• EXNOR gate
• Investigating the truth tables of basic logic gates
• Logic expressions for simple digital circuits (maximum of three inputs)
• Converting a given logic expression to a logic gate circuit
• Logic expression for a truth table
• Designing simple logic circuits
• Electronic memory
• Single memory element with NAND / NOR gates
• Basic SR flip-flop (Bistable)

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