UWB Impulse Transmitter Design

Abstract

This chapter presents the design of CMOS UWB tunable sub-nanosecond impulse and monocycle-pulse BPSK transmitters. The UWB impulse transmitter produces positive and negative tunable impulse signals corresponding to the high- and low-level modulation signals, respectively. The positive and negative impulse signals have amplitudes of 0.8 and 0.6 V with tunable pulse widths from 100 to 300 ps, respectively. The UWB monocycle-pulse transmitter produces monocycle pulse signals of opposite polarities having peak-to-peak amplitudes of about 0.6–0.8 V and tunable pulse widths between 100 and 300 ps. This chapter also covers the design of the CMOS impulse generator and BPSK modulator used in the UWB impulse and monocycle-pulse transmitters. The impulse generator can generate 0.95–1.05 V peak-to-peak Gaussian-type impulse signal with 100–300 ps tunable pulse duration. Moreover, this chapter includes the design of a CMOS monocycle pulse generator, which can produce 0.7–0.75 V peak-to-peak monocycle pulse with 140–350-ps tunable pulse duration.