A 2-11-GHz high linearity CMOS down-conversion mixer with wideband active baluns using 0.18-m CMOS technology is demonstrated in this paper. The mixer employs a folded cascode Gilbert cell topology and on-chip broadband active baluns. The folded cascode approach is adopted to increase the output swing, and the linearity is enhanced by a harmonic distortion canceling technique derived from the harmonic balance analysis. The proposed configuration shows the highest IIP 3 and IP 1 dB , and exhibits more compact size than most published studies. A broadband active balun is used to generate wideband differential signals, together with the derivation of a closed-form expression for the phase imbalance. This single-ended wideband mixer has the conversion gain of 6.9 1.5 dB, input 1-dB compression point (IP 1 dB ) of 3.5 dBm, single-sideband noise figure of 15.5 dB, and third-order input intercept point (IIP 3 ) of 6.5 dBm under the power consumption of 25.7 mW from a 1.8-V power supply. The chip area is 0.85 0.57 mm 2 .
In this paper, we develop a multiple output laser with 14 outputs. The multiple output laser composes of an 8x8 arrayed waveguide grating (AWG) and a semiconductor optical amplifier (SOA). We combine these two elements to achieve a ring configuration in this experiment. The multiple output laser with AWG can provide multichannel of light sources simultaneously. The characteristics of all unconnected fiber arms of the 8x8 AWG multiplexer are measured.
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