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Broadband voltage-controlled oscillator supporting low-gain change

A voltage-controlled oscillator, low-gain technology, used in power oscillators, automatic power control, electrical components, etc.

Inactive Publication Date: 2019-09-24
WUHAN SYNTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problem that the VCO design in the prior art is difficult to meet the wide band and small gain change at the same time, the present invention provides a voltage-controlled oscillator with a wide output frequency range and small tuning gain change

Method used

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  • Broadband voltage-controlled oscillator supporting low-gain change
  • Broadband voltage-controlled oscillator supporting low-gain change
  • Broadband voltage-controlled oscillator supporting low-gain change

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Embodiment Construction

[0042]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] An embodiment of the present invention provides a wideband voltage-controlled oscillator that supports low gain variation, such as figure 1 As shown, the broadband voltage-controlled oscillator includes an inductance component 1 connected in parallel, a switched capacitor array 2, a varactor unit 3 and a compensation circuit 4;

[0044] The varactor unit 3 includes a variable bias varactor unit 31 and a switch varactor pair tube unit 32;

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Abstract

The invention discloses a broadband voltage-controlled oscillator supporting low-gain change, and belongs to the technical field of semiconductor integrated circuits. The broadband voltage-controlled oscillator comprises an inductor assembly (1), a switched capacitor array (2), a varactor unit (3) and a compensation loop (4) which are connected in parallel. The varactor unit (3) comprises a variable bias varactor unit (31) and a switch varactor unit (32), the variable bias varactor unit (31) is used for adjusting the fine tuning gain change of the broadband voltage-controlled oscillator, and the switch varactor unit (32) is used for adjusting the coarse tuning gain change of the broadband voltage-controlled oscillator. The voltage-controlled oscillator is wide in output frequency range and small in tuning gain change.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuits, in particular to a wide-band voltage-controlled oscillator supporting low gain variation. Background technique [0002] With the development of wireless communication technology and integrated circuit industry, transceiver chips compatible with multiple protocols have become a research hotspot in the field of wireless communication. As a key module of the RF front-end, the frequency synthesizer is mainly used to provide a frequency-programmable local carrier signal to the frequency conversion circuit in the transceiver. In order to improve spectrum efficiency, most modern wireless communication systems use frequency division multiplexing technology to divide the total bandwidth of the channel used to transmit signals into several sub-frequency bands (or sub-channels), and each sub-channel transmits one signal. The wireless transceiver performs real-time channel switchin...

Claims

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Application Information

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IPC IPC(8): H03L7/099H03B5/20H03B5/32
CPCH03L7/099H03B5/20H03B5/32
Inventor 刘览琦邹维胡昂杨阳江帆逯召静石琴琴张科峰
Owner WUHAN SYNTEK CO LTD
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