| Citation: |
Xu Qiming, Shi Yin, Gao Peng, Hu Xueqing, Yan Jun, Xu Hua, Chen Hongda. A DC-Offset Cancellation Scheme in a Direct-Conversion Receiver for IEEE 802.11a WLAN[J]. Journal of Semiconductors, 2006, In Press.
Xu Q M, Shi Y, Gao P, Hu X Q, Yan J, Xu H, Chen H D. A DC-Offset Cancellation Scheme in a Direct-Conversion Receiver for IEEE 802.11a WLAN[J]. Chin. J. Semicond., 2006, 27(4): 653.
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A DC-Offset Cancellation Scheme in a Direct-Conversion Receiver for IEEE 802.11a WLAN
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Abstract
A DC-offset cancellation scheme in a 5GHz direct-conversion receiver compliant with the IEEE 802.11a wireless LAN standard is presented.An analog feedback loop is used to eliminate the DC-offset at the output of the double-balanced mixer.The test results show that the mixer with the DC-offset cancellation circuit has a voltage conversion gain of 9.5dB at 5.15GHz,a noise figure of 13.5dB,an IIP3 of 7.6dBm,a DC-offset voltage of 1.73mV eliminating 76% of DC-offset,and a power consumption of 67mW with a 3.3V supply.The direct conversion WLAN receiver has been implemented in 0.35μm SiGe BiCMOS technology. -
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