Crystal oscillator circuit

A technology of crystal oscillators and circuits, which is applied in the directions of electrical components and generators, can solve problems such as the difficulty of starting vibrations, and achieve the effect of reducing the difficulty of starting vibrations and speeding up the response speed

Inactive Publication Date: 2017-09-22
长沙方星腾电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned traditional crystal oscillator has the disadvantage of being difficult to start oscillation, and the start-up time of some frequency crystal oscillators even reaches several seconds or even tens of seconds, which is unacceptable in many system applications

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Embodiment Construction

[0010] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0011] In order to solve the technical problem that the traditional crystal oscillator is difficult to vibrate, the present invention provides a crystal oscillator circuit, such as figure 2 As shown, including: the first resistor R1, the second resistor R2, the first inductor L1, the second inductor L2, the first capacitor C1 and the second capacitor C2; the first capacitor C1, the first inductor L1, the first resistor ...

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Abstract

The invention provides a crystal oscillator circuit, and belongs to the technical field of semiconductor integrated circuits. The crystal oscillator circuit comprises a first resistor R1, a first inductor L1, a first capacitor C1 and a second capacitor C2; the first capacitor C1, the first inductor L1 and the first resistor R1 are connected in series in sequence to serve as a first branch, the crystal oscillator circuit is characterized by further comprising a second resistor R2 and a second inductor L2; the second inductor L2 is connected with the second capacitor C2 and the second resistor R2 in parallel to form a circuit, the circuit is used as a second branch, and the first branch and the second branch are connected in parallel and are connected between an input end UIN and an output end UOUT. According to the crystal oscillator circuit provided by the invention, on the basis of the traditional crystal oscillator circuit, the second inductor and the second resistor are imported, and due to the import of the second inductor and the second resistor, the oscillation starting difficulty of the crystal oscillator circuit is greatly reduced, and the response speed of the system is accelerated.

Description

technical field [0001] The invention belongs to the technical field of semiconductor integrated circuits, and in particular relates to a crystal oscillator circuit. Background technique [0002] Crystal oscillators are referred to as crystal oscillators for short, and are made of crystal plates with piezoelectric effects. When the crystal sheet is subjected to the action of 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 crystal, the vibration becomes very strong, which is the response of the resonance characteristic of the crystal. Utilizing this characteristic, it is possible to replace LC (coil and capacitor) resonant tanks, filters, etc. with resonators. Due to the advantages of small size, light weight, high reliability, and high frequency stability, resonators are used in household appliances and communication equipment. Because of its extrem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L3/00
CPCH03L3/00
Inventor 不公告发明人
Owner 长沙方星腾电子科技有限公司
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