Question
Download Solution PDFA type of amplitude modulation in which carrier is suppressed is called
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFIn a balanced modulator, 2 AM-modulators are connected in a way that the resultant signal does not contain the carrier spectrum, i.e. to generate a Double Side-band suppressed carrier (DSB-SC).
Analysis:
The circuit diagram of a balanced modulator is as shown:
The resultant DSB signal is the difference of the two, i.e.
Hence,
The frequency spectrum of the DSB-SC signal:
The standard DSB-SC equation is given as:
Assuming a single tone message signal as:
The DSB-SC signal can be written as:
∴ The output of balanced modulator contains the modulation frequency, LSB and USB.
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