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Narrowband switching millimeter wave voltage-controlled oscillator with wide tuning range

A technology of voltage-controlled oscillators and wide tuning, applied in power oscillators, electrical components, etc., can solve problems such as poor phase noise performance, achieve good phase noise, avoid high-order harmonic distortion, and good symmetry

Active Publication Date: 2020-01-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the phase noise performance of this invention is very poor, when the oscillation frequency is 29GHz, the phase noise is only -82dBc / Hz@1MHz
[0007] To sum up, although there have been a lot of researches on the structure of CMOS millimeter-wave VCO circuits, they are all optimized for specific indicators. At present, the VCO's frequency, phase noise, tuning range, and power consumption cannot be well realized. multiple optimizations

Method used

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  • Narrowband switching millimeter wave voltage-controlled oscillator with wide tuning range
  • Narrowband switching millimeter wave voltage-controlled oscillator with wide tuning range
  • Narrowband switching millimeter wave voltage-controlled oscillator with wide tuning range

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Embodiment 1

[0033] The voltage-controlled oscillator of the present invention is composed of a negative resistance unit, a main oscillator circuit, a filter capacitor, a narrow-band switching circuit, and an output buffer stage circuit. A narrow-band switching VCO unit such as figure 1 as shown, figure 2 It is an overall narrow-band switching circuit controlled by a four-bit control word.

[0034] Among them, the negative resistance unit provides energy for the resonant cavity to maintain oscillation. The main oscillating circuit adopts an improved π-type differential circuit structure to realize oscillation and improve the quality factor of the resonant circuit. The filter capacitor and the tail current source MOS tube form a low-pass filter. , to reduce the phase noise of the oscillator, the output buffer stage connects the four narrow-band VCOs with a common drain, and outputs the selected narrow-band VCO, while providing sufficient drive for subsequent circuits.

[0035] 1. The nega...

Embodiment 2

[0041] figure 1 It is the circuit principle diagram of the millimeter-wave voltage-controlled oscillator based on the CMOS technology proposed by the present invention. The voltage-controlled oscillator is composed of a negative resistance unit, a main oscillator circuit, a filter capacitor, a narrow-band switching VCO and an output buffer stage circuit. Among them, the negative resistance unit adopts a cross-coupled pair tube complementary structure, the main oscillator circuit adopts an improved π-type differential circuit structure, the filter capacitor adopts a large capacitor and a tail current source to form a low-pass filter, and the narrow-band switching VCO includes four groups of VCOs with different frequencies , The output buffer stage adopts a two-stage buffer structure. By adopting the voltage-controlled oscillator of the present invention, a millimeter-wave voltage-controlled oscillator with low phase noise, low power consumption and wide tuning range can be obt...

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Abstract

The invention discloses a narrowband switching millimeter wave voltage-controlled oscillator with a wide tuning range, and the narrowband switching millimeter wave voltage-controlled oscillator comprises a negative resistance unit which provides energy for maintaining oscillation for a resonant cavity, and a main oscillation circuit which employs an improved pi-type differential circuit structureand is used for achieving the oscillation and improving the quality factor of a resonant circuit; the filter capacitor and the tail current source MOS tube form a low-pass filter, so that the phase noise of the oscillator is reduced; the narrowband switching circuit comprises four basic LC VCOs. The output buffer circuit connects the four narrow-band VCOs in a common-drain manner, outputs the selected narrow-band VCO, and provides driving for subsequent circuits. According to the invention, based on the 65nm CMOS process design, good noise performance is realized.

Description

technical field [0001] The invention relates to the field of radio frequency oscillators, in particular to a millimeter-wave voltage-controlled oscillator with a wide tuning range based on CMOS technology, using narrow-band switching technology and an improved π-type structure. Background technique [0002] With the continuous development of modern science and technology, wireless communication technology has become the biggest hotspot in the field of communication, and it has also been widely used in mobile phone networks, wireless local area networks, Bluetooth, satellite TV, aerospace, radar technology, national defense and military affairs, etc. Radio Frequency Integrated Circuit (RFIC), as the physical support of wireless communication technology, has been gradually integrated into the field of daily life and national security, and is constantly changing our production and lifestyle. Among them, millimeter waves can solve many problems faced by signals in high-speed tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/12H03B5/04
CPCH03B5/1228H03B5/04Y02D30/70
Inventor 谢生王敏毛陆虹
Owner TIANJIN UNIV
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