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High-Q resonators may be used to synthesize selective bandpass filters. Many commercial radio-frequency filters are based on coupled-resonators and realized in surface and bulk acoustic wave technologies due to the high quality factor and compact size of acoustic resonators. In this paper, it is shown that discrete-time equivalent of coupled-resonator bandpass filters may be realized using passive...
A reconfigurable software-defined radio receiver supporting dual-band carrier aggregation is demonstrated in a 65nm LP CMOS technology. A front-end filter, leveraging both the input impedance and voltage transfer functions of an N-path filter, can be configured either as a parallel bandpass or a series notch filter. The dual-band carrier aggregation is achieved by combing a conventional N-path filter...
A software-defined radio (SDR) wireless receiver leveraging discrete-time (DT) RF signal processing is introduced. The proposed DT signal processor, which applies switched capacitor techniques to radio frequencies, achieves harmonic rejection, image rejection, and frequency translation simultaneously. A frequency tunable high-Q 2nd-order bandpass input impedance is synthesized by the DT RF signal...
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