Title :
The design of 2 V 2.4 GHz CMOS low-noise low-power bandpass amplifier with parallel spiral inductors
Author :
Wu, Chung-Yu ; Zhou, Zhong-Yun
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A 2.4 GHz low-noise low-power single-to-differential bandpass amplifier is implemented in 0.5 μm CMOS process. In this bandpass amplifier, the compact tunable positive-feedback circuit is connected to the integrated spiral inductor to enhance its Q value. The simple diode varactor circuit is adopted for center frequency tuning. Two parallel spiral inductors are used to reduce the effective inductance and raise the center frequency. HSPICE simulation has been performed to verify the performance of the designed bandpass amplifier. It has been shown that the amplifier has a gain of 15 dB at Q=45 under 2 V power supply with 39 mW power dissipation. The noise figure is 4.36 dB in the passband. The tunable frequency range is between 2.369 GHz and 2.422 GHz. The gain difference and phase difference between the two differential output nodes are 0.0011905 dB and 179.932° respectively, at 2.4 GHz
Keywords :
CMOS analogue integrated circuits; MMIC amplifiers; UHF amplifiers; UHF integrated circuits; circuit tuning; feedback amplifiers; impedance matching; inductors; integrated circuit design; integrated circuit noise; low-power electronics; varactors; 0.5 micron; 15 dB; 2 V; 2.369 to 2.422 GHz; 2.4 GHz; 39 mW; 4.36 dB; CMOS LNA; UHF IC; center frequency tuning; diode varactor circuit; inductor Q-value; integrated spiral inductor; low-noise amplifier; low-power bandpass amplifier; parallel spiral inductors; single-to-differential bandpass amplifier; tunable positive-feedback circuit; CMOS process; Circuit optimization; Diodes; Frequency; Inductance; Inductors; Low-noise amplifiers; Spirals; Tunable circuits and devices; Varactors;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.813222
