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Load detection circuit for radio frequency matrix switch

A technology of load detection and matrix switch, which is applied in the direction of electronic switch, logic circuit connection/interface layout, electrical components, etc., can solve the problem that single pole double throw switch is difficult to meet the demand, achieve low return loss and ensure normal output Effect

Inactive Publication Date: 2015-04-29
SUZHOU FUFENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the increase of RF receiving / transmitting branches, ordinary single-pole double-throw switches (SPDTs) have been difficult to meet the demand, and the research on multi-input multi-output matrix switches has emerged.

Method used

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  • Load detection circuit for radio frequency matrix switch

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Effect test

Embodiment Construction

[0016] The design will be further described below in conjunction with the accompanying drawings of the description.

[0017] The radio frequency matrix switch load detection circuit is characterized in that: the load detection circuit is composed of a logic NOT gate and a 50Ω circuit, the transistor T1, the resistor R 1 , resistor R2 forms a logic NOT gate circuit; transistor T2, resistor R3, resistor R4, resistor R5, and capacitor C form a 50Ω circuit.

[0018] further:

[0019] The radio frequency matrix switch load detection circuit is characterized in that: the circuit input voltage terminal Vo provides a normal working voltage.

[0020] The radio frequency matrix switch load detection circuit is characterized in that: when the DC terminal DC is at a high level, the transistor T1 is turned on, and outputs a low level to the gate of T2, and T2 is turned off.

[0021] The radio frequency matrix switch load detection circuit is characterized in that: when the DC is low leve...

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Abstract

The invention discloses a load detection circuit for a radio frequency matrix switch. The load detection circuit is characterized by consisting of a logic NOT gate circuit and a 50 ohm circuit, wherein a transistor T1, a resistor R1 and a resistor R2 form the logic NOT gate circuit; a transistor T2, a resistor R3, a resistor R4, a resistor R5 and a capacitor C form the 50 ohm circuit. The load detection circuit is required to be added between two output ends of the radio frequency matrix switch, and by controlling two levels of the output ends, the matrix switch has a relatively low return loss in any state, so that normal output of a radio frequency signal is ensured.

Description

technical field [0001] This design involves a radio frequency matrix switch load detection circuit, which belongs to the field of radio frequency technology. Background technique [0002] With the increasing market demand of GSM mobile phone communication and wireless local area network WI AN, the development prospect of monolithic integrated GaAs switch applied to the front end of radio frequency transceiver is getting wider and wider. Compared with P-diode switching circuits, GaAS switches have the advantages of simplified bias network, almost negligible DC power consumption, ultra-high-speed switching speed, etc., and compared with standard CMOS switching circuits, they also have lower insertion Loss, has a clear advantage in the switch market in recent years. [0003] With the increase of RF receiving / transmitting branches, ordinary single-pole double-throw switches (SPDTs) have been difficult to meet the demand, and the research on multi-input multi-output matrix switc...

Claims

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Application Information

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IPC IPC(8): H03K17/94H03K19/0175
Inventor 张会林孙利华
Owner SUZHOU FUFENG TECH