公开(公告)号：US10367451B2

公开(公告)日：2019-07-30

申请号：US15696533

申请日：2017-09-06

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Peng Ye ,  Feng Tan ,  Xingqi Liu ,  Duyu Qiu ,  Lianping Guo ,  Kuojun Yang ,  Qinchuan Zhang ,  Huiqing Pan

IPC: H03B5/04 ,  H03B5/32 ,  H03L1/02

Abstract: The present invention provides a temperature-compensated crystal oscillator based on digital circuit, a closed-loop compensation architecture is employed to realize the high precision compensation of the crystal oscillator. The output frequency f(T) of the TCXO to be compensated is directly connected with the compensation voltage Vc(T) in real time, and the compensation voltage is fed back to the voltage control terminal of the VCXO to be compensated to compensate, so that the output frequency after compensation is equal to the target frequency signal, thus avoiding the frequency shift of output signal caused by temperature hysteresis, i.e. the discrepancy between the temperature acquired by a temperature sensor and the real temperature of the resonant wafer in the prior art.