Radio-frequency apparatus having electrostatic protection

Abstract

The invention discloses a radio frequency device capable of electro static precaution, which comprises an antenna, an inductor, a capacitor and a radio frequency circuit. The radio frequency device utilizes the antenna to receive radio frequency signals, when the radio frequency signals are sent to the radio frequency device, electro static signals can invade the radio frequency device by means of the antenna, the capacitor can transmit the radio frequency and insulate the electro static signals, and the inductor can transmit the electro static signals and insulate the radio frequency device. Therefore, the electro static signals can be transmitted to an earth terminal by the inductor in electro static events. Further, the impedance value of the capacitor is kept in a first range, the impedance value of the inductor is kept in a second range, and then the combined impedance of the capacitor and the inductor can match with the circuit, thereby achieving the purpose of insulating electro static signals under specific voltage.

Description

technical field [0001] The present invention relates to a radio frequency device with electrostatic protection, and in particular to a radio frequency device which utilizes a circuit structure composed of capacitors and inductors to simultaneously achieve electrostatic protection and impedance matching. Background technique [0002] During the manufacturing process of integrated circuits (ICs) or after the chips are completed, electrostatic discharge (ESD) events are often the main cause of damage to integrated circuits. Therefore, integrated circuits generally require an electrostatic protection function to prevent external electrostatic signals from damaging the integrated circuits. For example, today's radio frequency devices (such as wireless transceivers, mobile phones, global positioning systems, etc.) use antennas to transmit and receive radio frequency signals, but must consider that the transmission paths provided by the antennas will also cause electrostatic discha...

AI Technical Summary

Problems solved by technology

However, the current electronic components that can be used as the ESD suppression element 120, such as low-capacitance varistors or polymer ESD suppressors, often have the problem of high prices.

In addition, the traditional radio frequency device 100 using the traditional ESD suppression device 120 as electrostatic protection cannot pass the test condition of level 3 (air discharge + / -8kv) in the IEC61000-4-2 test specification

In other words, the traditional radio frequency device 100 using the traditional ESD suppression element 120 has a very poor electrostatic protection effect

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