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Radio frequency switch circuit, switch chip and communication terminal

A technology of radio frequency switch and switching circuit, which is applied in the field of radio frequency, can solve the problems of transistor damage and the reduction of the overall voltage resistance of the unit circuit, and achieve the effect of improving the switching performance and solving the problem of voltage resistance

Pending Publication Date: 2019-01-18
辽晶半导体(惠州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inconsistent voltage of each transistor in the unit circuit, the transistors on both sides bear higher voltage, resulting in the reduction of the overall withstand voltage capability of the unit circuit, and the transistor is more likely to be damaged due to the inconsistent voltage.

Method used

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  • Radio frequency switch circuit, switch chip and communication terminal
  • Radio frequency switch circuit, switch chip and communication terminal
  • Radio frequency switch circuit, switch chip and communication terminal

Examples

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Embodiment Construction

[0034] 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 creative efforts fall within the protection scope of the present invention.

[0035] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second" and ...

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PUM

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Abstract

The invention discloses a radio frequency switch circuit, a switch chip and a communication terminal. The radio frequency switch circuit comprises a radio frequency input terminal, a radio frequency output terminal, a switch circuit and a grid voltage control circuit. The switch circuit comprises a plurality of first switch tubes, a plurality of first switch tubes are sequentially connected in series between a radio frequency input terminal and a radio frequency output terminal, and at least one second switch tube is connected in parallel with a source electrode and a drain electrode of at least one first switch tube among the plurality of first switch tubes, wherein the source electrodes of the first switch tube and the second switch tube are connected with each other, and the drain electrodes are connected with each other. The gates of the plurality of first and second switching transistors are respectively connected to a gate voltage control circuit. The invention effectively solvesthe voltage withstand problem of the transistor unit and improves the switching performance.

Description

technical field [0001] The invention relates to the field of radio frequency technology, in particular to a radio frequency switch circuit, a switch chip and a communication terminal. Background technique [0002] The radio frequency switch, including a switch core and a switch controller, is used to control the on and off of the radio frequency communication signal connected to the transmitting antenna. With the rapid development of wireless technology, the number of modes and frequency bands in the multi-mode and multi-band smart phone system represented by LTE technology of 3G / 4G wireless technology is constantly increasing. For example, the working modes include GSM, TDSCDMA, WCDMA And TDD-LTE, etc., the frequency band covers the range from 700MHz to 6GHz. Smartphones and other mobile terminals select the required power magnification through the radio frequency switch, establish the channel of the mode and frequency band signal, and realize it by controlling the on-off o...

Claims

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Application Information

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IPC IPC(8): H03K17/08
CPCH03K17/08
Inventor 梁海浪
Owner 辽晶半导体(惠州)有限公司
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