Anti-interference receiver circuit for radiofrequency transceiver chip

Abstract

The invention belongs to the technical field of receiver circuit structure design in a radiofrequency integrated circuit technology, and relates to an anti-interference receiver circuit for a radiofrequency transceiver chip. The circuit comprises a low-noise transconductance amplifier, a passive mixer, a receiver signal main path composed of an I path and a Q path of orthogonal transimpedance amplifiers with the same circuit structure, and an interference signal energy collector composed of an I path fully-differential gyrator, a Q path fully-differential gyrator, four resistors with the sameresistance, four capacitors with the same capacitance and two differential transconductance amplifiers. The interference signal close to the frequency of a useful signal can be effectively eliminatedwithout causing extra attenuation to the useful signal, so that the sensitivity of the receiver is ensured, and the linearity and the dynamic range of the receiver are improved. The circuit is compactin structure and simple in implementation mode, can be completely integrated into one radiofrequency transceiver chip, does not need an off-chip crystal filter, is convenient to debug and design, andis beneficial to reducing the cost of the receiver.

Description

technical field [0001] The invention belongs to the technical field of receiver circuit structure design in radio frequency integrated circuit technology, and in particular relates to an anti-jamming radio frequency receiver circuit. Background technique [0002] Wireless communication technology has developed rapidly in recent years, and the fifth-generation mobile communication (5G) puts forward high requirements on the performance of wireless communication chips, especially radio frequency transceiver chips. With the increasing utilization of spectrum resources in wireless communication, the electromagnetic environment where wireless transceivers are located is becoming more and more complex, and high-power interference signals often coexist with useful signals required for communication. In order to ensure signal quality, the wireless receiver of the radio frequency chip must have a high dynamic range, which can resist the interference of high-power useless signals in ad...

AI Technical Summary

Problems solved by technology

The disadvantage of this type of anti-interference technology is that the notch filtering process occurs before the low-noise amplifier, which also attenuates useful signals of adjacent frequencies, which reduces the sensitivity of the receiver and is not conducive to improving the overall dynamics of the receiver. scope

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