A fully integrated CMOS transmitter design for IR-UWB communication systems

A fully integrated CMOS impulse-based transmitter with on-off keying (OOK) modulation scheme, for ultrawideband (UWB) impulse radio (IR) system has been designed in a standard TSMC 0.18 mu m CMOS technology. A novel Gaussian mono-pulse generator using simple and robust design method has been presented. On-chip pulse shaping using LC Band-Pass Filter (BPF) is developed to meet the Federal Communications Commission (FCC) spectrum requirement. The proposed UWB transmitter has been laid out and post-layout simulation results are analyzed. A Gaussian mono-pulse of less than 100 ps falling/rising time with a 130 mVpp amplitude was observed, at a dock frequency of 500 MHz. The total power dissipation of the transmitter is 1.2 mW with only 316 mu W consumed by impulse generator. The output of the transmitter is 48 mVpp under a 1.2 V power supply.