Abstract
A high-performance mixer, known as the amplifier-driven double-balanced Gilbert-cell mixer, is proposed and implemented in 0.18 µm RFCMOS technology. A class-A amplifier-based current bleeding source is used to amplify the local oscillator signal and improve transconductance of the transconductor stage. The conversion gain is measured to be 17.5 dB when the LO power is −14 dBm only. The measured noise figure is better than 12.5 dB. The chip area is 1.2×1.3 mm and the power consumption is 12 mA at 1.5 V supply voltage.
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