Clock generator with dual-path temperature compensation

A method of operation within a timing signal generator having a resonator:

• generating an analog temperature signal and a digital temperature signal indicative of temperature of the resonator;
• generating an analog temperature compensation signal according to the analog temperature signal and a digital temperature compensation signal according to the digital temperature signal;
• driving the resonator into mechanically resonant motion;
• and
• generating a temperature-compensated output timing signal based on the mechanically resonant motion, the analog temperature compensation signal and the digital temperature compensation signal;
• wherein generating the temperature-compensated output timing signal comprises varying an element without a phase-locked loop (PLL) in a manner dependent on the digital temperature compensation signal, so as to shift operation of the PLL and correspondingly vary the temperature-compensated output timing signal.

A timing signal generator comprising:

• a resonator;
• means for generating an analog temperature signal and a digital temperature signal indicative of temperature of the resonator;
• means for generating an analog temperature compensation signal according to the analog temperature signal and a digital temperature compensation signal according to the digital temperature signal;
• means for driving the resonator into mechanically resonant motion;
• and
• means for generating a temperature-compensated output timing signal based on the mechanically resonant motion, the analog temperature compensation signal and the digital temperature compensation signal;
• wherein the means for generating the temperature-compensated output timing signal comprises means for varying an element within a phase-locked loop (PLL) manner dependent on the digital temperature compensation signal, to shift operation of the PLL and correspondingly vary the temperature-compensated output timing signal.