Microcontroller for temperature-compensated quartz crystal oscillator and using method of microcontroller

Abstract

The invention belongs to the technical field of microcontrollers, in particular to a microcontroller for a temperature compensation quartz crystal oscillator and a using method thereof. The microcontroller comprises a microcontroller and a clock circuit; and a voltage stabilizer, a temperature sensor, an AD converter, a processor, a memory, a PWM pulse width modulation unit and a second-order passive filter are arranged in the microcontroller. According to the microcontroller for a temperature compensation quartz crystal oscillator and the using method of the microcontroller, the clock circuitand the quartz crystal form an oscillator; a control voltage terminal of the clock circuit is controlled by the microcontroller; different PWM frequencies can be sent through the microcontroller; thejunction capacitance value of the variable capacitance diode is changed, the crystal oscillation frequency is further adjusted, the thought of adopting discrete devices for implementation is changed;the voltage stabilizer, the temperature sensor and the PWM second-order filter circuit are integrated into the microcontroller, the overall size of the crystal oscillator can be effectively reduced,the real-time performance of temperature induction is improved, the cost is reduced, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of microcontrollers, in particular to a microcontroller for temperature-compensated quartz crystal oscillators and a method for using the same. Background technique [0002] Quartz crystal oscillator, also known as quartz resonator, or crystal oscillator for short, is made of a quartz crystal plate with piezoelectric effect. When the quartz crystal sheet is subjected to an external alternating electric field, it will produce mechanical vibration. When the frequency of the alternating electric field is the same as the natural frequency of the quartz crystal, the vibration becomes very strong, which is the response of the crystal resonance characteristic. Because the crystal oscillator has the advantages of small size, light weight, high reliability, and high frequency stability, it is used in household appliances and communication equipment. [0003] In most applications, quartz crystal resonators have the a...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of microcontroller for temperature-compensated quartz crystal oscillator and using method thereof, to solve the existing present problem proposed in the above-mentioned background technology, the control part of temperature-compensated quartz crystal oscillator is made of multiple A single-function chip to complete, the 5V power supply is regulated to 3V by a voltage regulator to supply power to the temperature sensor and clock circuit, and the rest is directly powered by an external 5V power supply

After the 5V power supply is powered on, the temperature sensor senses the ambient temperature and feeds the signal back to the microcontroller. The clock circuit and the quartz crystal combine to generate a clock signal. The microcontroller controls the clock circuit to adjust the frequency of the quartz crystal output clock signal. , requires multiple chips and many resistance-capacitance electronic components to be mounted on the PCB, which not only costs a lot, but also takes up a lot of PCB area, large volume, and poor performance stability.

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