Radio frequency double-channel voltage controlled oscillator based on central tapped inductive switch

A technology of voltage-controlled oscillator and center tap, which is applied in the direction of automatic power control, electrical components, etc., can solve the problem of large chip area and achieve the effect of reducing the occupied area

Inactive Publication Date: 2009-08-05
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core part of the inductive switch dual-band voltage-controlled oscillator used in literature [1] (that is, the output buffer circuit is not included, and it is not shown in the figure) requires 4 inductors, and the integration of 4 on-chip inductors requires a large chip area.

Method used

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  • Radio frequency double-channel voltage controlled oscillator based on central tapped inductive switch
  • Radio frequency double-channel voltage controlled oscillator based on central tapped inductive switch
  • Radio frequency double-channel voltage controlled oscillator based on central tapped inductive switch

Examples

Experimental program
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Embodiment

[0026] This embodiment has the same image 3 The circuit shown is exactly the same circuit structure. The components and circuit parameters of this embodiment are listed as follows:

[0027] The inductances of the first inductor L1, the second inductor L2 and the third inductor L3 are respectively: 0.292nH, 0.292nH and 1.083nH;

[0028] The capacitance variation range of the first varactor diode C1 and the second varactor diode C2 is: 568.7fF—764.4fF;

[0029] The width-to-length ratios of the first MOS transistor M1 and the second MOS transistor M2 are both (96 / 0.18) μm / μm;

[0030] The width-to-length ratios of the third MOS transistor M3 and the fourth MOS transistor M4 are both (960 / 0.18) μm / μm;

[0031] The width-to-length ratio of the fifth MOS transistor M5 is (1000 / 1) μm / μm;

[0032] The voltage at the + terminal of the voltage source is 1.25V;

[0033] The bias voltage at the Vbias terminal is 0V;

[0034] The control voltage range of Ctrl terminal is 0-1.25V; ...

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Abstract

This invention relates to a RF double-band voltage-controlled oscillator based on a central tapping inductor switch, in which, IEEE802.11 is one of the radio LAN protocols widely used in the world at present and the RF front of a radio router based on said protocol needs a phase-locking ring to generate local signals between 2.4G and 5G bands and a background technology applies an inductor switch double band voltage-controlled oscillator, which needs 4 inductors, this invented oscillator applies one inductor with a central tapping to replace the two of the four in the background technology, which is advantaged that the chip area occupied by the IC central tapping on the chip is much smaller than that occupied by the two inductors and especially suitable for being a RF double band voltage-controlled oscillator in the chip of a RF front of a radio router.

Description

technical field [0001] The present invention relates to a radio-frequency dual-band voltage-controlled oscillator based on a center-tap inductance switch, to be precise, relates to a radio-frequency dual-band inductance-capacitance voltage-controlled oscillator based on a center-tap inductance switch, which belongs to the technology of integrated circuit design and signal processing field. Background technique [0002] In recent years, with the rapid development of radio frequency integrated circuit technology, people have used many wireless communication products in their daily life: mobile phones, Bluetooth communication products, global positioning systems and so on. In addition, with the emergence of wireless local area networks, people can access the Internet through wireless routers, thereby eliminating the inconvenience caused by wired Internet access and bringing great flexibility to users. [0003] IEEE802.11 is one of the most widely used WLAN protocols in the wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/099
Inventor 李勇景一欧赖宗声沈怿皓
Owner EAST CHINA NORMAL UNIV
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