Topics
Electronic Components/ Study of Components and Circuits
- Introduction to Electronic Components
- Classification Of Components
- Resistors
- Types of Resistors
- Capacitors
- Types of Capacitors
- Inductors
- Basics of Transformers
- Basics of Semiconductor Devices
- PN Junction Diode
- Half Wave Rectifier
- Types of diodes
- Transistors
- Transistor Amplifier
- Basic of Transistor as a Switch
- Switch Mode power Supply (SMPS)
- Classification of IC’S
Logic Gates and Sequential Circuit
- Introduction of Logic gates and sequential circuits
- Basics of Logic Gates
- Types of gates
- Odd/Even Parity
- DE-MORGAN'S Theorem
- NAND Gate is an Universal Building Block
- HALF ADDER AND FULL ADDER
- Multiplexers
- Demultiplexer
- Encoder
- Decoder
- FLIP-FLOPS
- Counters
- Shift Registers
Functional Hardware of Pc
Peripheral Devices
- Introduction and Basic Principles
- Working
- Advantages and Disadvantages
Switch Mode power Supply (SMPS)
SMPS (Switch Mode Power Supply) is a modern DC regulated power supply used in computers and TVs. It includes a transformer, diode rectifier, and capacitor filter, which provide unregulated DC output. A transistor, acting as a switch, regulates the power.
Basic principle & Working
In SMPS, instead of continuously conducting, the series pass transistor operates in switching mode, rapidly opening and closing like a switch. This reduces power dissipation.
An unregulated DC input (Vin) is applied to a switching transistor, chopping the voltage into pulses at 20 kHz. The transistor's base voltage alternates rapidly, acting as a switch. A diode prevents inductive kickback, and an LC filter smooths the output to low-ripple DC.
Advantages and Disadvantages
Advantage of SMPS
- Small in size and low cost power supply
- Low power dissipation results in less heating.
- Better regulation and efficiency.
Disadvantage of SMPS
- Since it uses a switching technique, it generates electromagnetic interference (EMI) like noise spikes, which may affect audio section of the main circuit.
- The control part of the circuit is expensive, complicated and less reliable.
