Patent ID: 6084921
Filing Date: 2000-07-04
Classification: H04L

Abstract:
A phase-shift keying transmitter comprising:a signal source providing first and second signal components having substantially the same frequency and being out of phase with each other;a first waveguide receiving said first signal component;a second waveguide receiving said second signal component;a first phase modulator connected to said first waveguide and responsive to a first control signal to selectively modulate the phase of said first signal component by a first predefined amount;a second phase modulator connected to said second waveguide and responsive to a second control signal to selectively modulate the phase of said second signal component by a second predefined amount; andan in-phase combiner connected to said first and second phase modulators so as to combine said selectively modulated first and second signal components and provide a phase-shift modulated combined output signal.