Crystal oscillator and crystal oscillator group

Abstract

The invention provides a crystal oscillator and a crystal oscillator group. The crystal oscillator comprises an oscillating circuit, a power supply terminal, a grounding terminal and an output terminal, and further comprises an enabling terminal and an enabling circuit connected with the enabling terminal, the enabling circuit and the oscillating circuit are connected in series between the power supply terminal and the grounding terminal, and the working state of the oscillating circuit is controlled according to a control signal from the enabling terminal. According to the invention, the on-off of the power supply does not need to be controlled by a multi-way switch, the crystal oscillators can be quickly switched among the plurality of crystal oscillators only by inputting the control signal to the enabling circuit, and the switched crystal oscillators can normally work without preheating, so that the stability of the system comprising the crystal oscillators can be ensured.

Description

technical field [0001] The invention relates to the technical field of electronics and circuits. More specifically, it relates to a crystal oscillator and a crystal oscillator set. Background technique [0002] Crystal oscillators have good frequency accuracy and stability, small size, and low power consumption. They are often used as time-frequency references and are widely used in communication, radar, navigation, and guidance systems. In many application fields, the equipment needs to run stably for a long time, and backups will be set up for internal key components such as crystal oscillators. When the working crystal oscillator suddenly fails or the frequency drifts greatly and cannot meet the system requirements, it can be switched to the backup crystal. oscillator, which keeps the system running normally. [0003] figure 1 It is a schematic diagram of the existing principle of switching multiple crystal oscillators through a multi-way switch. Such as figure 1 As ...

AI Technical Summary

Problems solved by technology

For the previous method of using multiple switches to switch multiple crystal oscillators, the large current flowing through the switch will not only affect the life of the switch, but also may cause the switch to heat up, resulting in temperature changes in the environment where the crystal oscillator is located.

For constant temperature crystal oscillators that require constant temperature operation, this will seriously affect their reliability

Images