| Citation: |
Li Wenyuan, Wang Zhigong, Mao Yinwei. CMOS Quadrature Modulator and Up-Conversion Mixer for802.11a Wireless LAN Systems[J]. Journal of Semiconductors, 2007, In Press.
Li W Y, Wang Z G, Mao Y W. CMOS Quadrature Modulator and Up-Conversion Mixer for802.11a Wireless LAN Systems[J]. Chin. J. Semicond., 2007, 28(9): 1364.
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CMOS Quadrature Modulator and Up-Conversion Mixer for802.11a Wireless LAN Systems
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Abstract
A quadrature modulator and an up-conversion mixer for an 802.11a wireless LAN system are designed and fabricated in 0.18μm gate length standard CMOS technology.A current feedback loop with a transconductor is used to improve the linearity of the quadrature modulator;An LC resonant tank is used as the load of the up-conversion mixer to improve its gain and increase the voltage swing.The measurement results show that the input P1dB achieves -3.6dBm,the transducer power gain of the circuit is -3.6dB,and the current consumes about 45.8mA with a 1.8V power supply.-
Keywords:
- RFIC,
- CMOS technology,
- quadrature modulator,
- up-conversion mixer,
- Gilbert cell
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References
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Proportional views
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