An ultra-wide band (UWB) receiver front-end that operates at the UWB frequency range, starting from 9 GHz -10.6 GHz is proposed in this paper. The proposed system consists of an off-chip microstrip antenna and CMOS differential low noise amplifier with a differential noise canceling (DNC) technique. The proposed antenna is trapezoidal dipole shaped with balun and printed on a low-cost FR4 substrate with dimensions 10 × 10 × 0.8 mm 3 . The balun circuit integrated with the ground antenna to improve the antenna impedance matching. Noise canceling is obtained by using a differential block with each stage having 2 amplifiers that generate differential signals, subtracted to improve total noise performance. The proposed DNC block improves NF by 50% while increasing total power consumption with only 0.1 Mw. The differential CMOS cascode LNA with DNC block is implemented using UMC 0.13 µm CMOS process, exhibits a flat gain of 19 dB, maximum noise figure of 2.75 dB, 1 dB compression point −16 dBm and 3rd order intercept point (IIP3) −10 dBm. The proposed system has total DC power consumption of 2.8 mW at 1.2 V power supply.
A micromachined piezoelectric cantilever transducer, which works as a microphone has been designed. The 1800 x 1800 x 2.9wn3 cantilever has a lead zirconate titnate (PZT) piezoelectric thin film sandwiched between two Aluminum electrodes on a supporting layer of silicon nitride. The static analysis of piezoelectric cantilever is typically performed, which describes the deflection of a generic m-layer piezoelectric multitnorph, and acoustic modeling of the microphone has been described. The maximum deflection at the tip of the cantilever is 22,pm , and the maximum difference output voltage between two electrodes is 0. Im V
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