Sound Apmlification Tarn Taran(g) Taran Taran

S.G.A.D.GOVT.GIRLS.SEN.SCHOOL,TARN TARAN Developed by:-Shweta Sharma(10th-F) Arminder Kaur(10th-F) Rajdeep Kaur(10th–F) Project guide:-Miss Nidha chopra Computer Faculty

S.G.A.D.GOVT.GIRLS.SEC.SCHOOL, TARN TARAN Developed By: -Shweta Sharma (10th- F) Arminder Kaur (10th-F) Rajdeep Kaur (10th- F) Guided By: -Miss. Nidha Chopra Computer Faculty

TOPICS COVERED • • •

Working Components Used Classification o Based On Electrical Elements o Based On Frequency Ranges

INTRODUCTION Amplifier is device for increasing the amplitude or power of an electric signal. It is used to amplify the weak electric current drawn from the antenna of a radio receiving set, the diminished current in a long distance telephone circuit, the electrical signal representing sound in a public address system and so on.

WORKING Typically, small variations in the input voltage produce corresponding but much larger variations in output voltage. The ratio of these voltage changes is called Amplification Factor.

COMPONENTS USED Firstly, Electron Tubes were used as a major component for amplification. Now a day Transistors have largely replaced electron tubes in most common devices. These elements exhibit a high amplification factor, operate without distortion over a wide frequency range and can be made extremely small. These days thousands of transistor amplifiers can be placed on a very small Silicon Chip.

CLASSIFICATION Amplifiers are classified by the Type of Electrical elements in the circuit or on Wide Frequency Ranges. A. Classification Based on Electrical Elements 1. INDUCTANCE COUPLED amplifiers are connected by Coils and Transformers. 2. CAPACITANCE COUPLED by Condensers. 3. IMPEDANCE COUPLED by Resistors. 4. DIRECT COUPLED amplifiers are connected directly without any electrical components. B. Based on Wide Frequency Range 1. Audio Frequency Amplifiers operate at 0 to about 100,000 cycles per second or 100 Kilohertz (kHz). 2. Intermediate Range deal with frequencies from 400 kHz up to 5 million Hz.

REFERENCES Encarta Encyclopedia

S.G.A.D.GOVT.GIRLS.SEN.SCHOOL,TARN TARAN Developed by:-Shweta Sharma(10th-F) Arminder Kaur(10th-F) Rajdeep Kaur(10th–F) Project guide:-Miss Nidha chopra Computer Faculty

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