| Popis: |
A fully integrated on-off keying (OOK) CMOS impulse-radio ultra-wideband (IR-UWB) transmitter is proposed for wireless sensor and body network applications where adjustable data rate and signal strength are prerequisites. The multi-derivative transmitter is capable of generating 3rd to 11th order derivative Gaussian pulses conforming to indoor FCC mask spectrum requirements. In addition, the transmitter is controlled by a single voltage source rather than multiple supply elements. These functionalities are obtained by combining controlled oscillating pulse and round-edged triangular pulse through an enhanced envelope shaper block. This proposed design also allows the transmitter to avert the use of on- and off-chip inductors, leading to increased space-efficiency. Simulation results achieved using 90 nm CMOS technology show output swing and pulse width domains of 410-633 mV and 300-770 ps, respectively, for a supply voltage of 1.2 V. Corresponding dynamic power consumption range is 0.73 to 1.2 mW considering 100 MHz pulse repetition frequency (PRF). |
