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Radio frequency switch circuit

A radio frequency switch and circuit technology, applied in electronic switches, electrical components, transmission systems, etc., can solve the problems of increasing the loss of stacked transistors in radio frequency switches, etc., and achieve the effects of optimizing insertion loss, improving performance, and saving power loss

Pending Publication Date: 2021-12-07
芯灵通天津科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a radio frequency switch circuit to solve the problem of increased loss caused by the number of stacked transistors, reduce the waste of radio frequency switch switching time, and improve the switching efficiency of the two states of transmission and reception

Method used

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  • Radio frequency switch circuit
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Embodiment Construction

[0041] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0042] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted...

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PUM

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Abstract

The invention provides a radio frequency switch circuit, which comprises a transmitting loop, a receiving loop, an antenna loop, a first grounding loop, a second grounding loop and a grid voltage bias circuit, and is characterized in that the transmitting loop, the receiving loop and the antenna loop are converged and connected at a total node; the other end of the transmitting loop is connected with the input node and provided with a first series switch; the other end of the receiving loop is connected with the output node and provided with a second series switch; the other end of the antenna loop is connected with the antenna node; one end of the first grounding loop is connected to the transmitting loop, and the other end is grounded and provided with a first parallel switch; one end of the second grounding loop is connected to the receiving loop, and the other end is grounded and provided with a second parallel switch; and the transmitting loop and the receiving loop are connected with the antenna loop by controlling the conduction and closing of the first series switch, the second series switch, the first parallel switch and the second parallel switch through the grid voltage bias circuit. According to the radio frequency switch circuit, the switching time is shortened, and the loss is reduced.

Description

technical field [0001] The invention belongs to the field of radio frequency switches, in particular to a radio frequency switch circuit. Background technique [0002] In the RF front-end circuit, the RF switch is an essential part. The radio frequency switch can selectively connect the antenna terminal and the input terminal, or connect the antenna terminal and the output terminal to realize two modes of signal transmission and reception, and is widely used in mobile phones. Usually, multiple transistors are stacked in order to improve the power handling capability of the radio frequency switch. However, in an RF switch, the more transistors are stacked, the greater the impedance in the on-state of the switch, and the greater the loss when the signal flows through the switch. The switching time between the transmitting and receiving states of the RF switch is also very important for the RF front end of the mobile phone. Contents of the invention [0003] In view of thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/687H04B1/44
CPCH03K17/687H04B1/44
Inventor 张瑞洋黄浦桓傅海鹏
Owner 芯灵通天津科技有限公司