This work presents a high rate IR-UWB transceiver chipset implemented in a 130 nm CMOS technology for WBAN and biomedical applications in the 3.1GHz-4.9GHz band. The transmitter is based on a pulse synthesizer and an analytical upconverted Gaussian pulse is used to predict its settings. Its measured peak to peak output voltage is equal to 0.9Vpp on a 100 load for a central frequency of 4GHz, and a supply voltage of 1.2V, which gives an emitted energy per pulse of 0.64pJ. The receiver is a non-coherent architecture based on a LNA followed by a peak voltage detector. A BER of 10-3 is measured for a 3.1GHz-4.9GHz input peak-to-peak pulse amplitude of 1.1mV which corresponds to a sensitivity of-85.8dBm at 1Mbps and gives a communication range estimated to 1.9m.
A new operational transconductance amplifier (OTA) builds with CMOS inverters only is proposed in this paper. Simulations with typical BSIM3V3 parameters of a 0.35 lm CMOS process have shown a 3.56 GHz gain-bandwidth product under 2.5 V supply voltage. The corresponding total harmonic distortion is equal to 0.46% for 2 V peak-peak differential output voltage. At the same supply voltage, the circuit can provided at each output a voltage swing of 2.25 V peak-peak. From V DD = 2 V to V DD = 2.5 V the differential transconductance varies from 72 to 108.4 lX -1 . The corresponding common mode rejection ratio and the total power consumption are always lower than -31 dBc and 800 lW, respectively. Typical application of a biquad filter is proposed to illustrate the circuit capabilities.
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