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Time division duplex wireless communication system front-end circuit

A wireless communication system and front-end circuit technology, applied in the field of front-end circuits to achieve the effect of reducing the area of ​​​​the silicon chip

Active Publication Date: 2020-01-31
中科威发半导体(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of the existing antenna switch, to provide a front-end circuit of a time-division duplex wireless communication system that can be directly connected to an external antenna or a matching network without using an antenna switch

Method used

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  • Time division duplex wireless communication system front-end circuit
  • Time division duplex wireless communication system front-end circuit
  • Time division duplex wireless communication system front-end circuit

Examples

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Embodiment 1

[0030] Embodiment 1: A front-end circuit 100 of a time-division duplex wireless communication system, which is multiplexed into a power amplifier (PA) of a transmitter and a low-noise amplifier (LNA) of a receiver, as shown in the attached figure 2 (b) shown.

[0031] Specific as attached figure 1 As shown, the front-end circuit 100 of the time division duplex wireless communication system includes a cascode differential pair amplifier 110, a balanced unbalanced converter (balun) 150 with a center tap on the primary side, and a differential inductor with a center tap 160.

[0032] The cascode differential pair amplifier 110 includes two cascode structures, and each cascode structure includes a first transistor and a second transistor, that is, the first transistor in a cascode structure is M 1，a , the second transistor is M 2，a , while the first transistor in another cascode structure is M 1，b , the second transistor is M 2，b . Thus the first transistor M in the two-way...

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Abstract

The invention relates to a TDD (time division duplex) wireless communication system front circuit comprising the following units: a cascode differential pair amplifier comprising two cascode structures and provided with a first port group and a second port group, wherein the grid bias voltage of each transistor can be dynamically configured; a balance / non-balance converter, wherein a primary sidecenter tap voltage can be dynamically configured, a difference port is connected with the first port group, and a single side port is connected with an external antenna or a matching network; a difference inductor, wherein the center tap voltage can be dynamically configured, two ends are connected with the second port group, the second port group forms the input / output port of the TDD (time division duplex) wireless communication system front circuit, and the TDD (time division duplex) wireless communication system front circuit has an emitter power amplification state and a receiver low noise amplification state. The TDD (time division duplex) wireless communication system front circuit can serve as the receiver low noise amplifier and the emitter power amplifier, and no antenna switch is needed, thus reducing the silicon chip areas, and preventing disadvantages of an on-chip integrated antenna switch.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a front-end circuit applied in a time-division duplex wireless communication system without an antenna switch. Background technique [0002] In the traditional time division duplex (Time Division Duplexing, TDD) communication system, since at the same time, at most one of the transmitter or the receiver is in the working state, the control circuit controls the antenna switch to connect the antenna and the working circuit, so that the receiver and transmitter share one antenna. That is, the front-end circuit of the traditional time-division duplex wireless communication system needs to include the power amplifier function (PA) of the transmitter and the low-noise amplifier function (LNA) of the receiver at the same time, and the two are switched by the antenna switch, as shown in the attached figure 2 (a) shown. [0003] With the continuous improvement of the cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B1/44H04B1/04H04B1/18
Inventor 胡雪青楚晓杰颜峻石寅
Owner 中科威发半导体(苏州)有限公司
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