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Voltage-controlled oscillator and output frequency control method thereof

A technology of voltage-controlled oscillators and oscillation circuits, which is applied in the fields of automatic power control and electrical components, and can solve problems such as unstable output frequency of voltage-controlled oscillators

Active Publication Date: 2014-03-12
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors found that in practical applications, the output frequency of the voltage controlled oscillator is unstable

Method used

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  • Voltage-controlled oscillator and output frequency control method thereof
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Embodiment Construction

[0041] In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

[0042] As mentioned in the background art, the output frequency of the existing voltage-controlled oscillator is unstable. The inventor found that the reason for this defect is mainly in the voltage-controlled oscillator circuit, which is affected by the process angle and the temperature of the environment. The...

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Abstract

The invention discloses a voltage-controlled oscillator and an output frequency control method thereof. The voltage-controlled oscillator comprises a status detection circuit, a digital to analog converter and an oscillating circuit, wherein the status detection circuit is used for detecting the process corners of the voltage-controlled oscillator and the temperature information of the environment where the voltage-controlled oscillator is located, generating correcting and adjusting information according to the process corners and the temperature information, and compiling the correcting and adjusting information into digital correcting and adjusting information; the digital to analog converter is used for converting the digital correcting and adjusting information into analog voltage; the oscillating circuit is used for controlling output frequency in a rated frequency range by taking the analog voltage as control voltage.

Description

technical field [0001] The present invention relates to the technical field of integrated circuits, and more particularly, to a voltage-controlled oscillator and a method for controlling the output frequency thereof. Background technique [0002] With the rapid development of the field of communication electronics, the performance requirements of electronic equipment are getting higher and higher, especially for such basic components as oscillators. Oscillators are an integral part of many electronic systems, ranging from clock generation in microprocessors to carrier synthesis in cellular telephones. [0003] The output frequency of VCO (Voltage-Controlled Oscillator) has a corresponding relationship with the input control voltage. The working state of the voltage-controlled oscillator or the component parameters of the oscillation circuit are controlled by the input control voltage, and its output frequency is the input voltage. the linear function of . The inventors fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099
Inventor 龙爽陈岚陈巍巍杨诗洋
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI