An
electronic circuit is composed of various types of components. Some of these
components are termed as active components because they take part in the
transformation of the energy while other components,
which only dissipate or store energy, are called as passive elements. The vacuum tubes, rectifier, transistors are some of-the common active while the resistances, which dissipate the power and energy storing elements such as capacitances and inductances are known as passive elements. The transformers may be regarded as a matching device. The success of any electronic circuit
depends not only on proper selection of the active elements but on the passive and matching elements too. The proper function, of an active device is decided by the proper values of these passive elements. Hence the selection of these elements such as resistances, inductances, capacitance, and transformers not only require the proper attention, but also decide the proper function of the active devices as well as the circuit as a whole.
which only dissipate or store energy, are called as passive elements. The vacuum tubes, rectifier, transistors are some of-the common active while the resistances, which dissipate the power and energy storing elements such as capacitances and inductances are known as passive elements. The transformers may be regarded as a matching device. The success of any electronic circuit
depends not only on proper selection of the active elements but on the passive and matching elements too. The proper function, of an active device is decided by the proper values of these passive elements. Hence the selection of these elements such as resistances, inductances, capacitance, and transformers not only require the proper attention, but also decide the proper function of the active devices as well as the circuit as a whole.
ELECTRONIC
COMPONENTS:
These can
be classified into
Passive Components: Components like resistance,
capacitance inductance fall in this class.
 |
| Resistors |
 |
| Capacitors |
 |
| Inductors |
Active Components: They can be further classified as Semiconductor
Devices: Semiconductor diode, zener diode, and varactor diode etc.
 |
| Zener diode |
 |
| Varactor diode |
Uni-junction
transistor, Bipolar junction transistor (BJT), FET, silicon, Controlled
rectifier etc.
FLZ42g~~60_35.JPG) |
| Uni-junction transistor |
 |
| Bipolar junction transistor |
 |
| FET - Field effect transistor |
Vacuum
Tube Devices: Vacuum tube
diode, triode, Tetrode, Pentode, Hexode, Heptode etc.
 |
| Vacuum tube - Triode |
Gas Tube Devices:
Gas diodes, Thyratons etc.
Photo
Sensitivity Devices : Gas photodiodes, photo multiplier tubes, photodiodes,
light emitting diode, photosensitive transistor etc.
Though
there are devices, which are specific to particular frequency range and
applications like microwave devices etc.
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