A 100M–1.5 GHz harmonic-rejection SDR receiver front-end

A 0.1-1.5 GHz harmonic-rejection software-defined radio (SDR) receiver front-end is presented. The front-end consists of a wideband LNA with the differential feedback inverter configuration and a harmonic rejection mixer with three Gilbert mixer paths. By using the feedback resistor, the LNA shows wideband input impedance matching characteristics and good gain and NF performance. Based on the detailed harmonic rejection analysis, a harmonic rejection mixer is presented. In order to make the harmonic rejection robust to gain and phase mismatch, the gm cells are set in array to calibrate the conversion gain of each mixer and realize the vector calibration which significantly improves the harmonic rejection ratio. The proposed RF front-end achieves an input impedance matching S11 <;-10 dB, NF <;2.6 dB and a conversion gain higher than 30dB. The third and fifth harmonics can be attenuated by higher than 40dB before the calibration. With the gm calibration method, the HRR can achieve ~60dB. The front-end consumes 13-15.1 mA current.

[2]  Jaeyoung Choi,et al.  A CMOS Wideband RF Front-End With Mismatch Calibrated Harmonic Rejection Mixer for Terrestrial Digital TV Tuner Applications , 2010, IEEE Transactions on Microwave Theory and Techniques.

[3]  Stefan Back Andersson,et al.  Wideband SAW-Less Receiver Front-End With Harmonic Rejection Mixer in 65-nm CMOS , 2013, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  Jonathan Borremans,et al.  A 0.9 V 0.4–6 GHz Harmonic Recombination SDR Receiver in 28 nm CMOS With HR3/HR5 and IIP2 Calibration , 2014, IEEE Journal of Solid-State Circuits.

[5]  Li Lin,et al.  A 1.75 GHz highly-integrated narrow-band CMOS transmitter with harmonic-rejection mixers , 2001, 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC (Cat. No.01CH37177).

[6]  Ilku Nam,et al.  A low noise and highly linear 2.4-GHz RF front-end circuit for wireless sensor networks , 2011, 2011 9th IEEE International Conference on ASIC.