Algorithmic optimization of spectral and temperature characteristic of MTCXO

The creation of a digital thermocompensation system is possible now on a basis of single chip of typical microcontroller. In paper the problems of assuring of clean spectrum characteristics of DTCXO output signal on the basis microcontroller at usage of the cheapest DAC solution-PWM are considered. The variants of control voltage shaping accuracy increasing are considered at the expense of second and higher orders PWM realization. The optimization of choice algorithm order is carried out. Besides, the variants of ADC accuracy increasing are described at the expense of special algorithms of statistical handling.