MODULATOR MODULATED BY FREQUENCY DISPLACEMENT CODE DEGREE M AT HIGH SPEED AND HIGH POWER OUTPUT

摘要

P The invention relates to a frequency displacement modulation modulator operating at high speed and with good power efficiency. The modulator comprises a coding logic, which generates (M / 2) Gray code signals (210) as a function of (N-1) control signal bits; and (M / 2) switching oscillators (700). Each switching oscillator includes: a composite quartz resonator (400); a first switch (500), which is controlled by Gray code signals with one end connected to a first end of the composite quartz resonator, and the other end grounded via a resistance circuit negative; a second switch (300), which is controlled by serial data with one end connected to the second end of the composite quartz resonator, and the other end grounded; and a capacitor, with one end connected to the second end of the composite quartz resonator and the other end grounded. /P