Chip design of WuRx front-end and IF Gm-C bandpass filter with antenna to near infrared charging for biomedical application

Abstract

A 1-V 5.8 GHz CMOS front-end applying in dedicated biomedical systems has been successfully implemented by TSMC 0.18 μm CMOS process. This system has built in near-infrared laser-driven (NIRLD) might be a promising wireless electrical power source and phase in wake up receiver technology using direct active RF detection for biomedical nanodevices power saving. This proposed prototype includes an input matching low noise amplifier (LNA), a passive balun, a down-conversion Gilbert mixer, a gm-boosting Colpitts VCO, followed by an intermediate frequency (IF) Gm-C bandpass filter. The measured results achieve an input return loss of 27 dB, a conversion gain (CG) of 29 dB, a double-side band (DSB) noise figure (NF) of 4.95 dB, and a third-order intercept point (IIP3) of -24.4 dBm, a tuning range of 5.17-5.98 GHz, a phase noise of -118.5 dBc/Hz at 1 MHz offset from 5.8 GHz and a power consumption of 27.6 mW from 1.0 V supply. The overall chip area including pads is 2.1 (1.75 × 1.2) mm2. This paper also has external connect with a broadband loop-type chip antenna to support biomedical nanodevices healthcare application.