Prof. Jay Mehta 7/12/2016Prof. Jay Mehta1. Principles of AM Definitions: The process of changing the amplitude of a relatively high frequency carrier.

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Prof. Jay Mehta 7/12/2016Prof. Jay Mehta1

Principles of AM Definitions: The process of changing the amplitude of a relatively high frequency carrier signal in proportion with the instantaneous value of modulating signal (information) A process of translating information signal from low band frequency to high band frequency. 7/12/2016Prof. Jay Mehta2

Cont’d… Amplitude of the carrier signal varies with the information signal. The modulated signal consist of carrier signal, upper sideband and lower sideband signals The modulated AM signal (figure 2) needs to go through demodulation process to get back the information signal. 7/12/2016Prof. Jay Mehta3

Correct Diagram 7/12/2016Prof. Jay Mehta4

7/12/2016Prof. Jay Mehta5

7/12/2016Prof. Jay Mehta6

Practical Waveform observed on DSO 7/12/2016Prof. Jay Mehta7

Incorrect Diagram 7/12/2016Prof. Jay Mehta8

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