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本文提出了一种在90nm CMOS工艺下实现的脉冲式超宽带（UWB）发射机，通过避免传统混频器上变频架构，有效解决了本振泄漏问题，并实现了1.8G脉冲/秒的高脉冲速率。
The potential of pulse-based ultra-wideband (UWB) technology has been demonstrated for high-data-rate short-distance wireless personal area networks (e.g., wireless USB) [1-3]. With the allocation of the spectrum from 3.1 to 10.6GHz by the Federal Communications Commission (FCC), transmitter architectures based on using a mixer to upconvert a baseband pulse have emerged [1, 2]. In these systems, the carrier frequency is inherently in the middle of the transmission bandwidth. Hence, transmitter local oscillator leakage to the output may call for a reduction in transmit power to be FCC compliant. Alternatively, continuous-time filters have recently been used in UWB transmitters for pulse shaping [3]. Because the responses of such filters are sensitive to process variations, it is very difficult to model all of the possible variations accurately enough and the filtered pulses may display long settling times, which results
Murat Demirkan, Richard R. Spencer
University of California, Davis, CA