Patent ID: 7180384

Claim:
A signal modulator that selectively generates a polar-modulated sequence and a quadrature-modulated sequence, comprising: an accumulator that provides a repeating phase sequence in response to a tuning word and a clock signal; a phase-to-amplitude converter that converts said repeating phase sequence to a sine sequence and a cosine sequence; a first summer inserted between said accumulator and said converter to selectively alter the phase of said repeating digital sequence in response to input phase symbols; a first multiplier coupled to provide a first multiplied sequence in response to first input quadrature symbols and a selected sequence of said sine sequence and said cosine sequence and further coupled to respond with said first summer and provide said polar-modulated sequence in response to input amplitude symbols and said selected sequence; and a second multiplier coupled to provide a second multiplied sequence in response to second quadrature symbols and the other sequence of said sine sequence and said cosine sequence; and a second summer coupled to provide said quadrature-modulated sequence in response to said first and second multiplied sequences.