An ultra-low power ASK modulator for back telemetry applications

This paper presents a CMOS 130nm near-threshold implantable transmitter which supports a 40Mb/s baseband data rate that utilizes the MedRadio spectrum for biomedical wireless communication. The proposed transmitter achieves a total power consumption of 780μW with the use of a reduced supply-rail voltage of 0.7V. The design incorporates a near-threshold VCO and ASK modulator that can be integrated into the ultra-low power biomedical transceiver for an implantable reverse telemetry communication.

[1]  Sangwook Nam,et al.  Low Power OOK Transmitter for Wireless Capsule Endoscope , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[2]  Ying Yao,et al.  An Implantable 64-Channel Wireless Microsystem for Single-Unit Neural Recording , 2009, IEEE Journal of Solid-State Circuits.

[3]  Jongsun Kim,et al.  An Energy-Efficient and High-Speed Mobile Memory I/O Interface Using Simultaneous Bi-Directional Dual (Base+RF)-Band Signaling , 2012, IEEE Journal of Solid-State Circuits.

[4]  Byunghoo Jung,et al.  A 0.5-V, 440-µW Frequency Synthesizer for Implantable Medical Devices , 2011, IEEE Journal of Solid-State Circuits.

[5]  N. Chaimanonart,et al.  A wireless batteryless in vivo EKG and body temperature sensing microsystem with adaptive RF powering for genetically engineered mice monitoring , 2009, TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference.

[6]  P. R. Troyk,et al.  Power and data for a wireless implanted neural recording system , 2011, 2011 5th International IEEE/EMBS Conference on Neural Engineering.

[7]  Zhihua Wang,et al.  Low-Power Transceiver Analog Front-End Circuits for Bidirectional High Data Rate Wireless Telemetry in Medical Endoscopy Applications , 2007, IEEE Transactions on Biomedical Engineering.

[8]  Peng Liu,et al.  Energy efficient 136 Mb/s OOK implantable transmitter for wireless brain computer interface , 2010, 2010 IEEE MTT-S International Microwave Symposium.

[9]  Kaamran Raahemifar,et al.  A low power current reused quadrature VCO for biomedical applications , 2009, 2009 IEEE International Symposium on Circuits and Systems.

[10]  Y. A. Eken,et al.  A 5.9-GHz voltage-controlled ring oscillator in 0.18-/spl mu/m CMOS , 2004, IEEE Journal of Solid-State Circuits.

[11]  R.R. Harrison,et al.  A Low-Power Integrated Circuit for a Wireless 100-Electrode Neural Recording System , 2006, IEEE Journal of Solid-State Circuits.

[12]  Qing Bai,et al.  A high-yield microassembly structure for three-dimensional microelectrode arrays , 2000, IEEE Transactions on Biomedical Engineering.