VTU Notes | 18CS33 - ANALOG AND DIGITAL ELECTRONICS

Photodiodes, Light Emitting Diodes and Optocouplers, BJT Biasing

Module-1

4.9
2018 Scheme | CSE Department

Created by VtuNotes.in
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5 Modules

18CS33 - ANALOG AND DIGITAL ELECTRONICS | Module-1 VTU Notes

VTU | 18CS33 | Module - 1

1. Photodiodes, Light Emitting Diodes (LEDs), and Optocouplers:

Photodiodes are semiconductor devices that convert light into electrical current. LEDs, on the other hand, emit light when current passes through them. Optocouplers use a combination of LEDs and photodiodes to isolate electrical signals between two circuits.

2. BJT Biasing: Fixed Bias, Collector-to-Base Bias, Voltage Divider Bias:

Biasing is a technique to establish the operating point of a bipolar junction transistor (BJT). Fixed bias uses a resistor to provide base current, collector-to-base bias employs a voltage divider for biasing, and voltage divider bias is a more stable configuration for proper BJT operation.

3. Operational Amplifier Application Circuits:

Operational amplifiers (op-amps) are versatile integrated circuits used in various applications. Multivibrators using IC-555 generate square wave or pulse signals. Peak detectors capture the maximum value of an input signal. Schmitt triggers are used to create digital square wave signals from analog inputs. Active filters shape frequency response. Non-linear amplifiers modify input-output relationships. Relaxation oscillators generate periodic waveforms.

4. Current-to-Voltage and Voltage-to-Current Converters:

Current-to-voltage converters, also known as transimpedance amplifiers, convert an input current to an output voltage. Voltage-to-current converters do the reverse, converting an input voltage to an output current.

5. Regulated Power Supply Parameters, Adjustable Voltage Regulator:

Regulated power supplies provide stable voltage outputs despite fluctuations in input or load conditions. Adjustable voltage regulators allow users to set the output voltage as needed.

6. D to A and A to D Converters:

Digital-to-analog converters (DACs) convert digital signals to analog voltages, useful in applications like audio systems. Analog-to-digital converters (ADCs) convert analog signals to digital data, allowing microcontrollers and computers to process real-world inputs.

These topics collectively provide an in-depth understanding of various electronic components and circuits used in analog electronics. They are essential for anyone studying electronics, electrical engineering, or related fields to build a solid foundation in designing and analyzing electronic systems.

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