Modulation and filtering device Patent #: 4003002
ApplicationNo. 07/174170 filed on 03/28/1988
US Classes:332/100, FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR332/149, AMPLITUDE MODULATOR375/296, Antinoise or distortion (includes predistortion)375/300, Amplitude modulation375/303Frequency shift keying
ExaminersPrimary: Grimm, Siegfried H.
Attorney, Agent or Firm
International ClassesH04L 27/04 (20060101)
H04L 27/02 (20060101)
H04L 27/10 (20060101)
H04L 27/12 (20060101)
Foreign Application Priority Data1987-03-28 JP
AbstractA binary signal modulator includes a sampling circuit for sampling a binary signal at a predetermined sampling frequency, a modulating circuit responsive to the sampled binary signal for generating a modulating signal, the rising and decaying timings of which are respectively determined by the start and end times of the binary signal and the rising and decaying characteristics of which are respectively defined as predetermined functions, and a circuit responsive to the modulating signal for generating a modulated signal.