[Show abstract][Hide abstract] ABSTRACT: This paper presents an integrated smart label for tracing food information and monitoring its preservation conditions. The system includes humidity, temperature, and light intensity sensors with the respective interface circuits, an A/D converter, and a 13.56-MHz RFID transponder for transmitting and receiving data, as well as for gathering from an external reader the energy for recharging the on-board microbattery and powering the transmitter. The proposed systems, designed in a 0.18-mum CMOS technology, achieves in simulation the required performance, in terms of functionality, accuracy, and power consumption.
[Show abstract][Hide abstract] ABSTRACT: In this paper the design of a programmable gain amplifier (0 dBdivide15 dB, 3 dB per step) embedded in the analog base-band chain for UWB Receivers in a standard 90 nm CMOS technology is presented. The design has been realized using a proper Matlab procedure. Due to the large bandwidth required in the UWB Receivers, the procedure takes into account the second order effects related with the opamp parasitic capacitance and finite bandwidth. In this way the model guarantees to satisfy the IRN and transfer function accuracy requirements and to avoid linearity performance degradation. Thanks to the results obtained by the Matlab procedure, no capacitance are used in the PGA schematic. From a single 1.2 V supply voltage, the PGA total current consumption is 3.5 mA, the inband IIP3 is 15 dBm and out-of-band IIP3 is 23 dBm, the maximum IRN is 16nV/radicHz at 15 dB gain.
[Show abstract][Hide abstract] ABSTRACT: In this paper the design of the analog baseband chain for UWB receivers in a standard 90 nm CMOS technology is presented. The baseband chain is composed by the 5<sup>th</sup> order elliptic analog low-pass filter and a programmable gain amplifier (with up to 60 dB gain). Due to the large UWB signal bandwidth (250 MHz), the design has been carried-out using a MATLAB model taking into account the capacitance parasitics effect and the opamp finite bandwidth impact on the filter transfer function. From a single 1.2 V supply voltage, the total power consumption is 13 mA per channel, the in-band and out-of-band IIP3 is 20 dBm and the maximum IRN for G>15 dB is 9 nV/radicHz.