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A voltage-controlled oscillator and its output frequency control method

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: 2016-08-17
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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  • A voltage-controlled oscillator and its output frequency control method
  • A voltage-controlled oscillator and its output frequency control method
  • A voltage-controlled oscillator and its output frequency control method

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Embodiment Construction

[0041] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0042] As described in the background technology, the output frequency of the existing voltage-controlled oscillator is unstable. The inventors found that the cause of this defect is mainly due to the influence of the process angle and the temperature of the environment in the voltage-controlled oscillator circuit. There will be a certain...

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Abstract

The invention discloses a voltage-controlled oscillator and its output frequency control method, comprising: a state detection circuit, a digital-to-analog converter, and an oscillation circuit, wherein: the state detection circuit is used to detect the process angle of the voltage-controlled oscillator and the The temperature information of the environment where the voltage-controlled oscillator is located, and generate calibration information according to the process angle and the temperature information, and compile the calibration information into digital calibration information; the digital-to-analog converter is used to convert the The digital calibration information is converted into an analog voltage; the oscillating circuit is used to use the analog voltage as a control voltage to control the output frequency to maintain a rated frequency range.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, and more specifically, to a voltage-controlled oscillator and a method for controlling its output frequency. 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 integral to many electronic systems, with applications ranging from clock generation in microprocessors to carrier synthesis in cellular phones. [0003] The output frequency of VCO (Voltage-Controlled Oscillator, 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 its input voltage. linear function of . ...

Claims

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Application Information

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Patent Type & Authority Patents(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