A Bandwidth and Frequency Calibration Method for OOK UWB-IR Transmitter with High Energy Efficiency
Abstract
In this paper, an offline bandwidth and frequency calibration method for an on–off LC oscillator-based ultra-wideband impulse radio (UWB-IR) transmitter is presented. Implemented in 0.18-m CMOS, the offline calibration circuits consume very little power. This allows the transmitter to consume an ultra-low average power of 319W over 3–5GHz at 2Mbps. The calibration is critical to ensure the FCC spectral mask compliance despite the process–voltage–temperature (PVT) variations. The transmitter can deliver a large differential output swing of 1.8–3V to a 100- load with minimal power efficiency of 7% at different data rates (2–30Mbps). It is suitable for WPAN application with localization and positioning capabilities.
This paper was recommended by Regional Editor Tongquan Wei.