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Three dimensional modeling of active pixel sensor with microlens is reported by using an advanced drift-diffusion simulator together with finite difference time domain method for optical effect in this work. The opto-electronic responses are presented versus various power intensity and illumination wavelength. The aperture size of the isolated metal layer is also discussed. Whereas microlens is shown...
A Dual Mode WiMAX/WLAN CMOS RF transceiver for the 2.5 and 3.5 GHz frequency bands is presented comprising one transmitter and two receivers. Current consumption of the direct conversion transceiver is 94/115 mA in TX and 83/105 mA in RX mode (2.5/3.5 GHz, 1 RX path active). Unwanted carrier and sideband leakage in transmit path can be calibrated using a dedicated downconversion mixer in a feedback...
A fully integrated high linearity low power and low cost transmitter in 120 nm CMOS technology with 2 RF-paths and integrated balun for broadband OFDM MIMO application is presented. The transmitter is used for the Wireless Gigabit with Advanced Multimedia (WIGWAM) research project. A maximum datarate of 970 Mbit/s can be achieved by transmitting a 256QAM OFDM MIMO signal with 80 MHz bandwidth and...
A flexible multimode receiver architecture for software defined radio systems with focus on GSM, WCDMA and CDMA systems has been designed in a 120 nm CMOS technology. The receiver consists of a wideband coilless common gate LNA2 with gain switches and a high linearity down-converter with current interface between mixer and baseband-filter. The LO signal of a 8 GHz VCO and divider with ratio 4 respectively...
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