Temperature compensation clock circuit based on multiple sensibilization

Abstract

The invention discloses a temperature compensation clock circuit based on multiple sensibilization, which realizes high-precision sensing of temperature by using signals after multiple sensibilization, and realizes high-stability clock signals through temperature compensation of a frequency synthesizer. The temperature compensation clock circuit comprises a driving circuit, a frequency mixing circuit, a frequency dividing circuit, a quantization circuit, a temperature compensation circuit and a frequency synthesizer circuit. The driving circuit drives the MEMS resonator to generate signals fa and fb, the frequency mixing circuit, the frequency dividing circuit and the quantization circuit carry out signal processing on the signals fa and fb to obtain a high-precision temperature sensing signal TDCout, the temperature compensation circuit carries out digital calibration on the TDCout signal to generate a temperature compensation amount TDCerror, and the frequency synthesizer circuit receives the TDCerror to carry out temperature compensation on the signal fa to generate a high-stability signal fout. According to the temperature compensation clock circuit, high-sensitivity temperature signals after multiple sensibilization are obtained through frequency mixing, frequency division and frequency ratio operation, and high-resolution temperature sensing is achieved for temperature compensation to obtain a high-stability clock.

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