A sub GHz mostly digital BPSK IR UWB transceiver

This paper presents a mostly digital IR UWB transceiver operating in 0~960 MHz frequency range for low power wearable and implantable biomedical devices. The UWB transmitter adopts a carrier-less pulse generator with BPSK modulation, and achieves energy efficiency of 100 pJ/pulse. Intermittent operation is adopted by the receiver to save power which consumes about 600 μW at 1 Mbps. The timing window of data coming is provided by a SAR DLL, which could retime the receiver clock to synchronize with the received data. This transceiver is implemented in 0.35 μm CMOS process and occupies a core area smaller than 0.8 mm².