Analog to analog conversion

#Analog signals are modified to represent analog data.
#Analog to Analog conversion can be done in three ways

1. P resentation topic Analog to analog conversion 3/12/2020 1

2. Analog Signal Analog signals are modified to represent analog data. Analog-to-analog conversion also called modulation. M odulation is generally needed when a  bandpass channel  is required. Bandpass is a range of frequencies which are transmitted through a bandpass filter. 3/12/2020 2

3. Analog to Analog conversion Analog to Analog conversion can be done in three ways : Amplitude Modulation Frequency Modulation Phase Modulation 3/12/2020 3

4.  AMPLITUDE MODULATION Process of changing the amplitude of high frequency carrier wave in accordance with intensity of signal is called AM. 3/12/2020 4

5. AMPLITUDE MODULATION B and width of AM signal = twice the bandwidth of modulating signal. B AM = 2 B If the modulation signal frequency increases, the amplitude of the carrier changes at a greater rate. 3/12/2020 5

6. FREQUENCY MODULATION  Frequency modulation (FM), variation of the frequency of a  carrier wave  in accordance with the characteristics of a signal. 3/12/2020 6

7. PHASE MODULATION The modulation in which the phase of the carrier wave is varied according to the instantaneous amplitude of the modulating signal keeping amplitude and frequency as constant. 3/12/2020 7

8. End of presentation 3/12/2020 8