摘要
This paper presents an up-conversion mixer for 2.4-2.4835 GHz wireless sensor networks （WSN） in 0.18 μm RF CMOS technology. It was based on a double-balanced Gilbert cell type, with two Gilbert cells having quadrature modulation applied. Current-reuse and cross positive feedback techniques were applied in the mixer to boost conversion gain; the current source stage was removed from the mixer to improve linearity. Measured results exhibited that under a 1 V power supply, the conversion gain was 5 dB, the input referred 1 dB compression point was -11 dBm and the IIP3 was -0.75 dBm, while it only consumed 1.4 mW.
This paper presents an up-conversion mixer for 2.4-2.4835 GHz wireless sensor networks （WSN） in 0.18 μm RF CMOS technology. It was based on a double-balanced Gilbert cell type, with two Gilbert cells having quadrature modulation applied. Current-reuse and cross positive feedback techniques were applied in the mixer to boost conversion gain; the current source stage was removed from the mixer to improve linearity. Measured results exhibited that under a 1 V power supply, the conversion gain was 5 dB, the input referred 1 dB compression point was -11 dBm and the IIP3 was -0.75 dBm, while it only consumed 1.4 mW.
基金
supported by the National High Technology Research and Development Program of China(No.2007AA01Z2A7)
the Special Fund of Jiangsu Province for the Transformation of Scientific and Technological Achievements(No.BA2010073)
