Telecommunications Radioelectriques Et Telephoniques T.r.t.

Khamphuc Daulasim

An arrangement by which a sinusoidal wave is modulated in phase and amplitude in response to groups of bits includes an input (1) for receiving the groups of bits, a phase shifting circuit (5, 7) for producing two phase-shifted components of the wave and a modulating circuit for modulating the amplitude of the two components as a function of the groups. The modulating circuit includes a ROM (25), addressed by part of the n bits of the bit groups for producing an initial amplitude value, and a calculating unit (30) for obtaining final amplitude values by changing original values according to the remaining part of the bits of the bit groups.

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Longjumeau, France

Khamphuc Daulasim