A 500MHz- 2.7 GHz 8-path weaver downconverter with harmonic rejection and embedded filtering
نویسندگان
چکیده
This paper describes a combination of a Weaver mixer and an N-path filter for a superheterodyne receiver with a reconfigurable frequency plan. It uses an N-path topology driven with two different frequencies, effectively realizing a frequency shift together with band-pass filtering. To reduce transfers via harmonics other than the fundamental, a harmonic rejection scheme is used. A 28 nm FDSOI CMOS implementation with 30 dB harmonic rejection and an out-of-band IIP3 of >20 dBm is demonstrated. Keywords—Receiver, mixer, N-path filter, image rejection, harmonic rejection, frequency conversion, superheterodyne receiver
منابع مشابه
A Fully Integrated 5.2 GHz Do Rejection Gilbert Downconver HBT Techno
Abstract — A 5.2 GHz 1 dB conversion gain, IP1dB= -19 dBm and IIP3= -9 dBm double quadrature Gilbert downconversion mixer with polyphase filters is demonstrated by using 0.35 m SiGe HBT technology. The image rejection ratio is better than 47 dB when LO=5.17 GHz and IF is in the range of 15 MHz to 45 MHz. The Gilbert downconverter has fourstage RC-CR IF polyphase filters for image rejection. Pol...
متن کاملA Discrete-Time Mixing Receiver Architecture with Wideband Image and Harmonic Rejection for Software-Defined Radio
A discrete-time mixing architecture for software defined radio receivers is proposed. It exploits 8x RF voltage oversampling followed by charge domain weighting to achieve 40dB 3rd and 5th harmonic rejection without channel bandwidth limitations. Also noise folding is reduced by 3dB. A zero-IF downconverter chip in 65nm CMOS can receive RF signals up to 900MHz, with NFmin=12dB, IIP3=11dBm at <2...
متن کاملA 100-800 MHz 8-Path Polyphase Transmitter With Mixer Duty-Cycle Control Achieving <-40 dBc for ALL Harmonics
Radio transceivers capable of dynamic spectrum access require frequency agile transmitters with a clean output spectrum. High-Q filters are difficult to implement on chip and have limited tuning range. Transmitters with high linearity and broadband harmonic rejection can be more flexible and require less filtering. However, traditional Harmonic Rejection mixers suppress only a few harmonics. Th...
متن کاملTunable RF Notch Filters for Blocker Suppression
Periodically time-variant passive 8-path notch filters are demonstrated in 65nm CMOS technology, with a notch frequency tunable from 100MHz to 1.2GHz with a clock signal. In a 50Ω environment, filter insertion loss in the pass band is 1.4-2.8dB, while the rejection at the notch frequency is >20dB. Given their P1dB> +2dBm and IIP3> +17dBm, the filters can protect radio receivers from blocking ov...
متن کاملIntegrated radio frequency circuits for wideband receivers
Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Mikko Kaltiokallio Name of the doctoral dissertation Integrated radio frequency circuits for wideband receivers Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 36/2014 Field of research Electronic Circuit Design Manuscript sub...
متن کامل