5G standard source high-frequency crystal oscillator circuit

Abstract

The invention discloses a 5G standard source high-frequency crystal oscillator circuit, and belongs to the field of standard source crystal oscillators. The 5G standard source high-frequency crystal oscillator circuit comprises a crystal oscillator control circuit, the crystal oscillator control circuit comprises a clock reference unit, a high-frequency crystal oscillator unit and a PLL loop control unit, the clock reference unit comprises a programmable all-silicon temperature compensation oscillator, and the programmable all-silicon temperature compensation oscillator receives clock pulses input from the outside and outputs a low-frequency clock frequency Vout1; the high-frequency crystal oscillator unit comprises a voltage-controlled oscillator; and the voltage-controlled oscillator outputs a high-frequency clock frequency Vout2. The 5G standard source high-frequency crystal oscillator circuit has the advantages that the programmable all-silicon temperature compensation oscillator is slightly affected by external temperature, stable reference clock frequency is provided for the high-frequency crystal oscillator unit, the voltage-controlled oscillator filters the received clock frequency, it is guaranteed that output waveforms are stable, and the effect that a crystal oscillator circuit is affected by the temperature is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of standard source crystal oscillators, in particular to a 5G standard source high frequency crystal oscillator circuit. Background technique [0002] At present, the central processing unit or integrated chip such as a single-chip microcomputer needs a clock circuit to provide a stable clock oscillation frequency, that is, a time signal. The faster the clock oscillation frequency of the clock circuit is, the more accurate the time that the central processing unit or integrated chip can control . The clock circuit mainly relies on the crystal oscillator circuit to generate the oscillation frequency. In 5G and other technologies that require high clock frequency, the crystal oscillator circuit is required to generate extremely high and stable oscillation frequency. The usual high-frequency crystal oscillator circuits are very susceptible to external temperature, vibration and other conditions, and are diffic...

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Problems solved by technology

[0004] The prior art solutions above have the following defects: usually the crystal unit uses a voltage-controlled oscillator, and the voltage-controlled oscillator has the characteristics of good waveforms and smooth phase noise curves, and the quality of the clock frequency provided is good, but it is easily affected by temperature. When the circuit is hot, the clock frequency output by the voltage-controlled oscillator is prone to errors. Even if there is a clock reference unit to compensate the high-frequency crystal oscillator unit, the clock frequency output by the high-frequency crystal oscillator unit is still difficult to meet the standard

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