A sub-GHz UWB data transmitter with enhanced output amplitude for implantable bioelectronics

Abstract

An all-digital ultra-wideband (UWB) transmitter is proposed for wireless data transmission in bioelectronics. Edge combination method is utilized to generate a Gaussian-shape output pulse. Thanks to the proposed pulse-boosting technique that used during pulse generation, the peak-to-peak output amplitude of this transmitter can be up to 160 mV, under 1 V power supply. The output power spectral density (PSD) is mainly concentrated in the frequency range of 0–960 MHz, which can satisfy the Federal Communications Commission (FCC) mask requirements. Manchester encoder and OOK modulation circuit are closely cooperated to reduce the bit error rate during data transmission. Designed with 0.18 μm CMOS, this proposed UWB transmitter has an active area of 110.9 μm × 73.6 μm. The energy consumption of this transmitter is 0.65 pJ/bit, with the maximum pulse repetition frequency of 200 MHz. The miniaturized size and low energy consumption make this transmitter very competitive, compared with other state-of-the-art works.