8.3 Analog to Digital Conversion
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It could be required to convert an analog signal to another analog signal. |
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This could be due to the need to transmit the original signal at a higher frequency. |
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Analog to analog conversion is a modulation technique which involves changing a characteristic of a carrier signal to integrate the analog data signal. |
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There are three types of analog to analog modulation as illustrated in Figure 8.6: Amplitude Modulation (AM), Frequency Modulation (FM) and Phase Modulation (PM). |
