A 2.4-GHz 6.4-mW Fractional-N Inductorless RF Synthesizer

被引:18
|
作者
Kong, Long [1 ,2 ]
Razavi, Behzad [1 ]
机构
[1] Univ Calif Los Angeles, Elect Engn Dept, Los Angeles, CA 90095 USA
[2] Oracle, Mixed Signal Design Grp, Santa Clara, CA 95054 USA
关键词
Sigma Delta noise; cascaded phase-locked loop (PLL); fractional-N synthesizer; noise filter; noise trap; PLL; DELTA-SIGMA MODULATOR; FREQUENCY-SYNTHESIZER; PLL; LOOP;
D O I
10.1109/JSSC.2017.2686838
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A cascaded synthesizer architecture incorporates a digital delay-line-based filter and an analog noise trap to suppress the quantization noise of the Sigma Delta modulator. Operating with a reference frequency of 22.6 MHz, the synthesizer achieves a bandwidth of 10 MHz in the first loop and 12 MHz in the second, heavily suppressing the phase noise of its constituent ring oscillators. Realized in 45-nm digital CMOS technology, the synthesizer exhibits an in-band phase noise of -109 dBc/Hz and an integrated jitter of 1.68 ps(rms).
引用
收藏
页码:2117 / 2127
页数:11
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