What is an Electronic Circuit?
Electronic Circuits for Beginners.
An Electronic Circuit a structure to direct and control electric currents perform some useful function.
The very name “circuit” implies that the structure is closed, something like a loop.
What is Electric Current?
What is an Electric Circuit?
An Electric Circuit is a conductive path for flow of current or electricity. It is also called electrical circuit. A conductive wire is used to establish relation among source of voltage and load. An ON / OFF switch and a fuse is also used in between the source and load.
When is a Circuit Called Electronic Circuit?
A circuit comprising of electronic components such as capacitor, resistor, diode, transistor, inductor, coil, transformer etc is called an Electronic Circuit. These components can be either through-hole or SMD.
These components or devices are connected to each other via conductive traces (generally of copper) or conductive wires through which electric current can flow. In simple words, these electronic components are soldered onto a PCB to perform a predefined work.
A circuit to be called “Electronic Circuit” rather than an “Electrical Circuit” must have at least one active component.
What are Active Electronic Components?
Active electronic components are those that can control flow of electricity. Most PCB (Printed Circuit Board) have at least one active component.
Example: Transistors, Integrated Circuits or ICs, Logic Gates, Vacuum Tubes, Silicon-Controlled Rectifiers (SCRs).
What are Passive Electronic Components?
Passive components are those that do not have gain or directionality. They are also called Electrical elements or electrical components.
Example: Resistors, Capacitors, Diodes, Inductors.
Types of Electronic Circuit
An circuit can of following types:
1. Analog Electronic Circuit
Analog electronic circuit are those in which signals may vary continuously with time to correspond to the information being represented.
Example: Electronic Equipment like voltage amplifiers, power amplifiers, tuning circuits, radios, and televisions are mainly analog.
2. Digital Circuit
A digital circuit is a circuit where the signal is either of the two discrete levels – ON / OFF or 0 / 1 or True / False. Transistors are used to create logic gates perform Boolean logic.
Example: Multiplexers, De-multiplexers, Encoders, Decoders, Counter, Flip-Flop
3. Mixed-Signal Circuit
Mixed-Signal Circuit, are also called hybrid circuits, contain elements and properties of both Analog Circuit and Digital Circuit.
Examples: Comparators, Timers, PLLs, ADCs (Analog-to-Cigital Converters), and DACs (Digital-to-Analog Converters).