Technology rejuvenates the phasing SSB system

Single sideband (SSB) systems provide reliable, efficient communications for thousands of amateurs and for millions of customers of major telephone companies. However, it is still held in disfavor by many people. One of the most important reasons is related to the requirement for linear RF amplification. The phasing method of SSB generation described in the present article eliminates this requirement. The considered method was formerly difficult to implement. But the difficulties have been overcome with today's sophisticated circuits. Attention is given to a typical pulse-width modulator which can be employed for collector or drain modulation, a phasing-type SSB transmitter, the RF chain in the phasing transmitter, and a standard audio phase shifter.