A Receiver Front-End Circuit Based on Integrated Inductive Noise Cancellation Technology

Abstract

The invention relates to a receiver front-end circuit based on an integrated inductor noise cancelling technology, and belongs to the field of radio frequency and millimeter wave integrated circuits. The receiver front-end circuit comprises two same branch circuits which comprise low noise amplifiers, I-channel frequency mixers, Q-channel frequency mixers, and trans-impedance amplifiers; an input signal is divided into two channels and the two channels are connected with the input ends of the low noise amplifiers of the two branch circuits respectively; the output ends of the low noise amplifiers of the branch circuits are connected with the public input ends of the I-channel and Q-channel frequency mixers in the branch circuits; the local oscillator ends of the I-channel frequency mixers in the two branch circuits are respectively connected with the local oscillator input ends of the whole circuit; the local oscillator ends of the Q-channel frequency mixers of the two branch circuits are respectively connected with the Q-channel local oscillator input ends of the whole circuit; the differential output end of the I-channel frequency mixer in one branch circuit is connected with the differential output end of the Q-channel frequency mixer in the other branch circuit, and is connected with the differential input end of the trans-impedance amplifier in the other branch circuit. Through the application of the receiver front-end circuit, the thermal noise generated by an integrated inductor can be eliminated greatly.

Description

technical field [0001] The invention belongs to the field of radio frequency and millimeter wave integrated circuit design, in particular to the design of a front-end circuit of a receiver with high performance and low noise figure (Noise Figure: NF). Background technique [0002] With the development of CMOS (Complementary Metal-Oxide-Semiconductor: Complementary Metal-Oxide-Semiconductor) high-speed wireless communication circuits and systems, and the continuous improvement of user requirements for communication quality and speed experience, the rate of information exchange continues to increase, especially Indoor high-speed communication needs are becoming more and more important. According to Mason's prediction, by 2016, 80% of the global wireless communication data volume will be generated indoors. In this context, the wireless local area network (WLAN) technology is advancing by leaps and bounds, among which the IEEE 802.11 series standards are the most representative...

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Problems solved by technology

This approach increases the cost of circuit manufacturing and affects the degree of integration; the other is to use common on-chip integrated inductors, such as the reference "SanghoonJoo, Tae-Young Choi, and Byunghoo Jung, "A 2.4-GHzResistive Feedback LNA in 0.13-μm CMOS,"IEEE J.Solid-State Circuits,vol.44,no.11,pp.3019-3029,Nov.2009》

This scheme inevitably introduces high thermal noise

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