Voltage-controlled oscillator oriented to distribution network state monitoring and noise reduction and quality improvement method thereof

A technology of voltage-controlled oscillators and voltage-controlled oscillations, applied in power oscillators, components of electrical measuring instruments, instruments, etc., can solve problems such as high power consumption of detection circuits, high phase noise, and low circuit quality factors, and achieve Effects of improved quality factor, high oscillation frequency, enhanced stability

Inactive Publication Date: 2019-07-30
QINZHOU POWER SUPPLY BUREAU OF GUANGXI POWER GRID CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of technology is still immature, and the ratio of input to output is not ideal
[0003] At present, with the development of network, communication and information technology, the status monitoring of the power grid is developing towards globalization and systematization, and more new sensor technology and inte

Method used

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  • Voltage-controlled oscillator oriented to distribution network state monitoring and noise reduction and quality improvement method thereof
  • Voltage-controlled oscillator oriented to distribution network state monitoring and noise reduction and quality improvement method thereof
  • Voltage-controlled oscillator oriented to distribution network state monitoring and noise reduction and quality improvement method thereof

Examples

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Example Embodiment

[0062] Please refer to figure 1 , A typical CMOS cross-coupled voltage-controlled oscillator, whose oscillation frequency is determined by the inductor L and the varactor C var Determined by transistor M 1 And M 2 The negative resistance generated by the formed cross-coupled active circuit is used to compensate the loss of the LC resonant circuit.

[0063] Please refer to figure 2 , Shown is the cross-coupled voltage-controlled oscillator after adding a capacitor without feedback. Although this structure improves the phase noise of the circuit, the power consumption is relatively large.

[0064] Please refer to image 3 , Is a voltage-controlled oscillator with a cross-coupling structure based on capacitor feedback technology proposed in the present invention. A capacitor is introduced between two differential output ports. The capacitor has a feedback function and can further reduce the phase noise of the circuit; at the same time, By using transistor M 3 And M 4 The realized se...

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Abstract

The invention relates to a voltage-controlled oscillator oriented to distribution network state monitoring and a noise reduction and quality improvement method thereof, and belongs to the field of distribution network operation state monitoring. The voltage-controlled oscillator is based on a novel 5.17 GHz CMOS. By adopting a capacitance feedback technology for improving the circuit quality factor, the parasitic effect of the circuit can be reduced in a high frequency band on the premise of not needing an additional substrate bias voltage, the phase noise of the circuit is improved. Meanwhile, the power consumption of the circuit is reduced by adopting a self-substrate bias technology without the substrate bias voltage. The capacitance feedback technology is adopted to improve the qualityfactor of the circuit, thereby reducing the phase noise. The working voltage of the circuit is reduced by adopting a self-substrate bias technology, so that the power consumption of the circuit is reduced.

Description

technical field [0001] The invention belongs to the technical field of distribution network state operation monitoring, in particular to a voltage-controlled oscillator oriented to distribution network state monitoring and a method for reducing noise and increasing product voltage. Background technique [0002] Developed countries have started research on online monitoring technology of power distribution system very early, but due to technical limitations in the early stage, coupled with the harsh operating environment of the power grid and many variable factors, the results of system status monitoring and the actual status of the power distribution system Due to incomplete correspondence and other reasons, the development of monitoring technology is slow and its application is limited. With the development of basic technology and theory, power system condition monitoring and early warning technology has gradually developed. However, the application of technology is still ...

Claims

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Application Information

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IPC IPC(8): H03B7/06G01R31/08G01R1/30
CPCG01R1/30G01R31/086H03B7/06
Inventor 邹宇池小兵谢振俊陈恒龙
Owner QINZHOU POWER SUPPLY BUREAU OF GUANGXI POWER GRID CO LTD
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