Radio communication systems often use two analog system and a differential system. In section III, proposed 3-signals as real and imaginary parts of a complex number; the phase system involving expansion of the differential circuits two signals are usually called I and Q signals. The analog signal is introduced on an integrated circuit is usually a differential signal which is the voltage difference between positive and negative nodes.II. COMPARISON BETWEEN SINGLE-ENDED AND Therefore, a complex number is expressed using 4-node voltages.
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