Multi-cavity coupled low-phase noise voltage-controlled oscillator

A voltage controlled oscillator, low phase noise technology, used in power oscillators, automatic power control, electrical components, etc. To eliminate the deterioration of phase noise, reduce circuit power consumption, and improve the performance of phase noise

Inactive Publication Date: 2018-07-06
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Multi-cavity coupled low-phase noise voltage-controlled oscillator
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[0023] In order to further illustrate the advantages of the present invention and the specific technical means adopted, the specific embodiments of the present invention will be described in detail below with reference to the drawings. It is understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art shall modify various equivalent forms of the present invention to fall within the protection scope of the claims of this application.

[0024] Reference figure 1 , The following specifically discloses the specific structures of the first to fourth voltage-controlled oscillators. The multi-resonator-coupled low-phase noise voltage-controlled oscillator of the present invention includes a first voltage-controlled oscillator (110) and a second voltage-controlled oscillator (120). ), a third voltage controlled oscillator (130) and a fourth voltage cont...

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Abstract

The invention discloses a multi-cavity coupled low-phase noise voltage-controlled oscillator. A plurality of voltage-controlled oscillators are coupled to each other by the circuit of the voltage-controlled oscillator to improve phase noise performance, and a current multiplexing technology is used to reduce power consumption of the circuit. The circuit of the voltage-controlled oscillator includes a first voltage-controlled oscillator, a second voltage-controlled oscillator, a third voltage-controlled oscillator and a fourth voltage-controlled oscillator which are coupled to each other. The negative resistance unit circuit of each voltage-controlled oscillator adopts a current multiplexing structure to reduce power consumption and remove the deterioration caused by the second harmonic ofthe common mode node to the phase noise, and further improve the phase noise performance. The low-phase noise voltage-controlled oscillator provided by the invention is capable of effectively improving phase noise performance.

Description

technical field [0001] The invention belongs to the technical field of radio frequency integrated circuits, and in particular relates to a voltage-controlled oscillator with low phase noise. technical background [0002] As one of the core modules in the wireless communication system, the voltage-controlled oscillator is used to generate a signal with a stable frequency. It is often used to provide a reference clock for a digital circuit or provide a local oscillator signal required for up-and-down conversion for the transmission and reception links. As a key index to measure the performance of the voltage-controlled oscillator, phase noise directly affects the performance index of the entire system, so the voltage-controlled oscillator has always been a key technology in the field of integrated circuit design. The rapid development of wireless communication technology puts forward higher requirements on the phase noise performance of voltage-controlled oscillators. [00...

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Application Information

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IPC IPC(8): H03L7/099H03B1/04H03B5/08
CPCH03B1/04H03B5/08H03L7/099
Inventor 李斌
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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