Quadrature phase shift keying modulating apparatus

A quadrature phase shift keying modulating apparatus, comprising:

• a bit splitter adapted to divide a bipolar input bit stream into first and second data streams;
• a first binary phase shift keying modulator including a voltage-controlled first electrical source connected electrically to said bit splitter so as to receive the first data stream therefrom, and a first oscillator connected electrically to said first electrical source, said first oscillator including a first resonator which has a first resonant frequency and which is excited by said first electrical source in response to the first data stream so as to generate a first sine wave output that changes in phase depending on polarity of data bits in the first data stream;
• a second binary phase shift keying modulator including:
• a differentiator connected electrically to said bit splitter so as to receive the second data stream therefrom, said differentiator generating impulse signals corresponding to the second data stream;
• a second electrical source connected electrically to said differentiator;
• and a second oscillator connected electrically to said second electrical source, said second oscillator including a second resonator which has a second resonant frequency equal to the first resonant frequency and which is excited by said second electrical source in response to the impulse signals so as to generate a second sine wave output that changes in phase depending on polarity of the impulse signals and that is 90.degree. out of phase relative to the first sine wave output when the first and second data streams are the same;
• and
• a combiner connected electrically to said first and second binary phase shift keying modulators for combining output signals thereof in order to obtain a quadrature phase shift keying modulated output.