A wideband receiver front-end using 1st and 3rd harmonics of the N-path filter response

被引:14
作者
Elmi, Mohammad [1 ]
Tavassoli, Mahdi [1 ]
Jalali, Ali [1 ]
机构
[1] Shahid Beheshti Univ, Dept Elect Engn, Microelect Lab, Tehran, Iran
关键词
N-path filter; Harmonic selectivity; Harmonic rejection; N-path notch filter; Third harmonic; Multi-phase clock generator; Pseudo-differential N-path notch; VERIFICATION;
D O I
10.1007/s10470-017-1096-y
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
Harmonic selectivity and inaccessibility to accurate low-power high frequency clock generator are two main imperfections in the tunable N-path filters. In this paper, conventional N-path filter and conventional harmonic rejection (HR) N-path architectures are analyzed, and related equations are derived and are verified by simulation results. Furthermore, a wideband tunable receiver front-end using HR N-path switching systems is proposed. Using third harmonic of filter response instead of fundamental harmonic, the required input clock frequency in the multi-phase clock generator is decreased by a factor of three. The receiver front-end benefits low and high frequency bands. At low frequency band (0.4-1.2 GHz) the first harmonic, and at high frequency band (1.2-3.3 GHz) the third harmonic of filter response are selected and are downconverted to the baseband frequency. The structure is designed and is simulated using CMOS-90 nm technology in schematic level. The total power consumption and are mW and dB, respectively. Furthermore, NF at low and high frequency bands are 2.56 and 3.53 dB, respectively.
引用
收藏
页码:451 / 467
页数:17
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