Abstract
A novel design of voltage controlled temperature compensated crystal oscillator (VCTCXO) is presented. This design will consider the current temperature compensation and the voltage-controlled voltage of regulation of the central frequency as a whole. A variable capacitance diode is adopted to fit the function of two variables, which avoids the problem that the temperature of the crystal oscillator is decreased after the mutual interference between the load capacitance of the two varactor diodes and the change of the central frequency. On this basis, by the debug and work switch on the user control voltage of the output frequency control and microcontroller output voltage-controlled voltage switch, the voltage-controlled temperature compensation crystal oscillator can adapt to the user's output frequency control in the control voltage situation. This new approach provides a novel design of VCTCXO. The results show that this design achieve desired frequency temperature compensation effect.
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