Radio frequency protector

Abstract

The invention discloses a radio frequency protector used for miniaturizing radio frequency power amplifiers. The radio frequency protector comprises a radio frequency input protection unit, an ALC (automatic level control) unit, a temperature compensation unit, an AGC (automatic gain control) unit and a signal selection circuit unit, wherein the radio frequency input protection unit, the ALC unit, the temperature compensation unit, the AGC unit and the signal selection circuit unit are integrally designed and electrically connected with a same radio frequency attenuator circuit unit. The signal selection circuit unit is used for turning input protection control voltage and comparing the voltage respectively to AGC control voltage and ALC control voltage, the low-level voltage is used as output control voltage for controlling the radio frequency attenuator unit.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a radio frequency protection device. Background technique [0002] RF power amplification equipment is widely used in the mobile communication industry to increase signal transmission power and extend signal coverage. [0003] With the continuous development of mobile communication technology, the mobile communication technology of various standards is continuously improved, and the communication signals are also more complex. In general, automatic level control (English: Automatic Level Control, abbreviation: ALC) circuit, automatic gain control (English: Automatic Gain Control, abbreviation: AGC) circuit, temperature compensation circuit, The RF input protection circuit adopts a distributed design. For example, the large signal input that cannot be avoided by the traditional ALC circuit design fed back at the output end, the impact of this unavoidable large signa...

AI Technical Summary

Problems solved by technology

For example, the large signal input that cannot be avoided by the traditional ALC circuit design fed back at the output end, the impact of this unavoidable large signal input on RF power amplifier equipment can no longer be ignored, especially in high-power products and with linearization technology In the product design, the power amplifier device has been working in a state of near saturation or saturation, and the signal excitation exceeding the rated value will affect the reliability of the RF power amplifier device

Moreover, the traditional analog ALC circuit has a certain threshold for the control depth. If the threshold value of the control depth is exceeded, it will cause the level control threshold of the ALC circuit to jump, which will affect the reliability of the RF power amplifier equipment.

As the site selection of mobile communication equipment becomes more difficult, miniaturized product design for RF power amplifier equipment is required. The ALC circuit, AGC circuit, temperature compensation circuit, and RF input protection circuit of traditional distributed design occupy a large area, so Unable to miniaturize RF power amplifier equipment

[0004] To sum up, in general, the ALC circuit, AGC circuit, temperature compensation circuit, and RF input protection circuit of the distributed design for the control and protection of RF power amplification equipment occupy a large area, which cannot realize the miniaturization of RF power amplification equipment

Images