ETRI Journal | |
A CMOS Frequency Synthesizer Block for MB-OFDM UWB Systems | |
关键词: RFIC; CMOS; MB-OFDM; divide-by N; mixer; ultra-wideband; UWB; Frequency synthesizer; | |
Others : 1185532 DOI : 10.4218/etrij.07.0106.0207 |
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【 摘 要 】
A CMOS frequency synthesizer block for multi-band orthogonal frequency division multiplexing ultra-wideband systems is proposed. The proposed frequency synthesizer adopts a double-conversion architecture for simplicity and to mitigate spur suppression requirements for out-of-band interferers in 2.4 and 5 GHz bands. Moreover, the frequency synthesizer can consist of the fewest nonlinear components, such as divide-by-Ns and a mixer with the proposed frequency plan, leading to the generation of less spurs. To evaluate the feasibility of the proposed idea, the frequency synthesizer block is implemented in 0.18-m CMOS technology. The measured sideband suppression ratio is about 32 dBc, and the phase noise is -105 dBc/Hz at an offset of 1 MHz. The fabricated chip consumes 17.6 mA from a 1.8 V supply, and the die-area including pads is 0.9 �1.1 mm2.
【 授权许可】
【 预 览 】
Files | Size | Format | View |
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20150520112101355.pdf | 730KB | download |
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