Design of DQPSK Demodulator for Implantable Biomedical Devices

摘要

Implantable biomedical devices (IBDs) play a vital role in today's healthcare industry. Such applications demand high data rate, low power and small-sized demodulators. This work presents a simple small-sized low-power architecture for differential quadrature phase shift keying (DQPSK) demodulator for these devices. The proposed circuitry is designed in UMC 90-nm CMOS technology and occupies a layout area of 0.015mm(2). It is operated at 1-V supply voltage with a power consumption of 405 mu W. The carrier frequency is 10 MHz and the obtained data rate is 20 Mbps. Hence it exhibits a high data-rate-to-carrier-frequency (DRCF) ratio of 200% making it ideal for IBDs.