TY - JOUR
T1 - A 1-V 2.4-GHz low-power fractional-N frequency synthesizer with sigma-delta modulator controller
AU - Lee, Shuenn-Yuh
AU - Cheng, Chung Han
AU - Huang, Ming Feng
AU - Lee, Shyh Chyang
PY - 2005
Y1 - 2005
N2 - A 1-V low-power 2.4GHz fractional-N frequency synthesizer with sigma-delta modulator controller for Bluetooth applications is implemented in 0.18 μm CMOS technology. A novel structure dual-modulus divide-by-128/129 prescaler using dynamic D-flip-flop is proposed and the operating clock frequency can reach as high as 2.6 GHz at 1-V supply voltage. Moreover, a third-order feedforward sigmadelta modulator (SDM) is employed as a modulus controller to achieve an appropriate division ratio and suppress the fractional spurs. The simulation results show the synthesizer possesses the tuning range of 2.136 to 2.53 GHz and a phase noise of -126.85 dBc/Hz at 1MHz offset. Moreover, the core area without the SDM and the loop filter is 0.85 mm2, and the total power consumption is 8.94 mW.
AB - A 1-V low-power 2.4GHz fractional-N frequency synthesizer with sigma-delta modulator controller for Bluetooth applications is implemented in 0.18 μm CMOS technology. A novel structure dual-modulus divide-by-128/129 prescaler using dynamic D-flip-flop is proposed and the operating clock frequency can reach as high as 2.6 GHz at 1-V supply voltage. Moreover, a third-order feedforward sigmadelta modulator (SDM) is employed as a modulus controller to achieve an appropriate division ratio and suppress the fractional spurs. The simulation results show the synthesizer possesses the tuning range of 2.136 to 2.53 GHz and a phase noise of -126.85 dBc/Hz at 1MHz offset. Moreover, the core area without the SDM and the loop filter is 0.85 mm2, and the total power consumption is 8.94 mW.
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U2 - 10.1109/ISCAS.2005.1465211
DO - 10.1109/ISCAS.2005.1465211
M3 - Article
AN - SCOPUS:49749148815
SP - 2811
EP - 2814
JO - Proceedings - IEEE International Symposium on Circuits and Systems
JF - Proceedings - IEEE International Symposium on Circuits and Systems
SN - 0271-4310
M1 - 1465211
ER -