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This paper presents a 0.5–2GHz RF front-end with Series N-path Filter. With series 8-path filter applied, an ultimate rejection larger than 46 dB with 30 dB out-of-band rejection at 50 MHz offset is achieved. Dynamic power consumption is saved due to small filter switch size compared with parallel structures. Utilizing a tunable narrow band LNA in front of series N-path filter, 3rd harmonic rejection...
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