Heat-generating device and oven-controlled crystal oscillator including it

Abstract

The invention discloses a heating device which comprises a packaging ring. The packaging ring is provided with a packaging ring side wall, a packaging ring central hole is formed in the center of the packaging ring side wall, and a heating wire used for heating a crystal and a temperature measuring device used for detecting the temperature of the heating wire are arranged in the packaging ring side wall. The invention further discloses a constant-temperature crystal oscillator which comprises the crystal, and the heating devices are arranged on the periphery of the crystal in an annular shape. The heating wire and the temperature measuring device which are integrally fixed are placed in an injection molding mode or placed directly in the packaging ring side wall to form the heating device, the heating devices are sleeved on the periphery of the crystal of the constant-temperature crystal oscillator, thermal mutation of the crystal can be lowered, frequency stability of the crystal is guaranteed, the temperature measuring device can be utilized for real-time detection of heat of the heating wire, the effect that temperature transmitted to the crystal is constant is guaranteed, and normal use of the whole constant-temperature crystal oscillator can be further guaranteed.

Description

technical field [0001] The invention relates to a crystal oscillator, in particular to a heating device and a constant temperature crystal oscillator including the heating device. Background technique [0002] Crystal oscillators are quartz crystal oscillators. The application of quartz crystal oscillators has a history of decades. Because of its high frequency stability, it has always occupied an important position in the field of electronic technology. In particular, the rapid development of the information technology industry has made this crystal oscillator full of vitality. Quartz crystal oscillators are used as standard frequency sources or pulse signal sources in telecommunications, satellite communications, mobile phone systems, global positioning systems, navigation, remote control, aerospace, high-speed computers, precision measuring instruments and consumer electronics products. It provides a frequency reference, which cannot be replaced by other types of oscilla...

AI Technical Summary

Problems solved by technology

[0006] 1. The heating device in the crystal oscillator includes an inner heating tube 500 and an outer heating tube 600. Both the inner heating tube 500 and the outer heating tube 600 need to be made of anti-static sensitive materials, and the requirements for anti-static are very high, so that the entire crystal Higher cost of oscillators;

[0007] 2. The production process is complicated, the production speed is slow, and the efficiency is low, which is not conducive to mass production and installation;

[0008] 3. When there is a sudden change in the heat of the entire crystal oscillator, the heat will be directly transferred to the crystal 300 by the air, and the heat transfer speed will be accelerated to easily cause a sudden change in temperature. Mutations that eventually reduce the stability of Crystal 300

[0009] Looking at the crystal oscillators in the prior art, there are common defects, namely, complex production process, slow production speed, low efficiency, high production cost, and it is easy to cause thermal mutation of the crystal, resulting in a sudden change in the frequency of the crystal, which ultimately affects crystal stability

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