Multi-gate oscillation low-phase-noise constant-temperature crystal oscillator

Abstract

The invention discloses a multi-gate oscillation low-phase-noise constant-temperature crystal oscillator. The crystal oscillator comprises a metal shielding housing, an oscillation module arranged in the metal shielding housing, a constant-temperature module and a voltage stabilizing circuit used for providing a stable working power supply for the whole circuit, wherein the voltage stabilizing circuit is respectively connected to the oscillation module and the constant-temperature module; the oscillation module comprises a crystal for generating a stable low-noise oscillation signal, a multi-gate oscillation circuit and a multi-gate buffer output circuit used for realizing signal buffer and amplification output of the multi-gate oscillation circuit; the crystal, the multi-gate oscillation circuit and the multi-gate buffer output circuit are connected in sequence; the constant-temperature module used for providing constant temperature for the whole circuit comprises a temperature sensor and a temperature control circuit connected to the temperature sensor, and the temperature sensor is arranged on the crystal. The crystal oscillator has small volume, reliable circuit, simple debugging and good consistency and is suitable for mass production.

Description

technical field [0001] The invention relates to the fields of electronics, communication and radar, in particular to a multi-gate oscillating low phase noise constant temperature crystal oscillator. Background technique [0002] The full name of the crystal oscillator is a quartz crystal oscillator. It is a high-precision oscillator. It is widely used in military, civilian electronics, communication, radar and other equipment to provide a precise clock reference signal for the equipment. It can be roughly divided into 4 categories. : General purpose crystal oscillator (SPXO), voltage controlled crystal oscillator (VCXO), temperature compensated crystal oscillator (TCXO) and oven controlled crystal oscillator (OCXO). [0003] With the development and demand of technology, the requirements for constant temperature crystal oscillators (low phase noise, small size, high stability, etc.) are getting higher and higher. At present, high-frequency low-phase noise crystal oscillator...

AI Technical Summary

Problems solved by technology

At present, high-frequency low-phase noise crystal oscillators mainly use low-noise transistors as the key components for oscillation and buffer output. The main disadvantages of this implementation method are large size (the domestic minimum is 20mm×20mm×10mm), large debugging workload, and frequency and temperature stability. Not high (10E-7 level), high working voltage (+12V)

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