RF voltage-controlled oscillator

A technology of voltage-controlled oscillators and radio frequency, applied in the direction of power oscillators, electrical components, etc., can solve the problems of low current utilization, difficulty in starting oscillation, high power consumption, etc.

Active Publication Date: 2017-10-20
ZHUHAI JIELI TECH
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Class B VCO has the advantages of easy and reliable start-up, but the disadvantages are also obvious: the conduction angle of the oscillation tube is 180 degrees, the current utilization rate is low, and the power consumption is very high
In order to meet the requirements of low power

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • RF voltage-controlled oscillator
  • RF voltage-controlled oscillator
  • RF voltage-controlled oscillator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] In one embodiment, a radio frequency voltage controlled oscillator, such as figure 1 As shown, it includes an adaptive bias circuit 110 , an oscillating circuit 120 and an LC resonant tank 130 , and the oscillating circuit 120 is connected to the adaptive bias circuit 110 and the LC resonant tank 130 . The adaptive bias circuit 110 is used to output a bias voltage to the oscillation circuit 120 . The oscillating circuit 120 is used to drive the LC resonant circuit 130 to start oscillating in a B-type state according to the bias voltage. As the oscillation amplitude of the LC resonant circuit 130 gradually increases, the oscillating circuit 120 will be lower than the preset first when the amplitude of the bias voltage is smaller than the preset first The threshold voltage enters the C-type state, and the amplitude of the oscillation stops increasing when the magnitude of the bias voltage is less than the preset second threshold voltage; the first threshold voltage is gre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a RF voltage-controlled oscillator. The RF voltage-controlled oscillator comprises an adaptive bias circuit, an oscillation circuit and an LC resonant circuit; the oscillation circuit is connected with the adaptive bias circuit and the LC resonant circuit; the adaptive bias circuit outputs a bias voltage to the oscillation circuit; the oscillation circuit starts up the LC resonant circuit in a B type state to enable the LC resonant circuit to start oscillation based on the bias voltage, and the oscillation amplitude is increased gradually; and the oscillation circuit enters a C type state when the amplitude value of the bias voltage is smaller than a first threshold value, and increase of the oscillation amplitude is stopped when the amplitude value of the bias voltage is smaller than a second threshold value. As the adaptive bias circuit outputs the bias voltage to enable the oscillation circuit to start up the LC resonant circuit in the B type state, then the LC resonant circuit starts oscillation, and then the resonant circuit enters the C type state for oscillation along with the increase of the oscillation amplitude, the oscillation is easily started and high current utilization rate is obtained. As a compensatory resistor is added between the output ends of a first transistor and a second transistor and the ground, negative feedback stability is kept, and the stability within a wide working range is guaranteed.

Description

technical field [0001] The invention relates to the technical field of radio frequency oscillation control, in particular to a radio frequency voltage controlled oscillator. Background technique [0002] With the popularity of smart terminals, two radio frequency wireless connection technologies, Wi-Fi and Bluetooth, have been widely used as standard configurations. Due to the limitation of battery technology, the requirements for low power consumption of radio frequency chips are endless. A voltage-controlled oscillator (Voltage-Control Oscillator, VCO) is a key circuit module of a radio frequency chip, and has very strict requirements on its phase noise index. [0003] The usual RF VCO is Class B, which has a center-tapped inductor and two variable capacitors to form an LC resonant circuit. By changing the capacitance of the variable capacitor, the resonant frequency of the LC resonant circuit is controlled to the required value; two transistors are used as The oscillati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H03B5/12
CPCH03B5/1215
Inventor 陈春平
Owner ZHUHAI JIELI TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap