TY - GEN
T1 - A generic miniature multi-feature programmable wireless powering headstage ASIC for implantable biomedical systems
AU - Kubendran, Rajkumar
AU - Krishnan, Harish
AU - Manola, Bhupendra
AU - John, Simon W.M.
AU - Chappell, William J.
AU - Irazoqui, Pedro P.
PY - 2011
Y1 - 2011
N2 - Wireless powering holds immense promise to enable a variety of implantable biomedical measurement systems with different power supply and current budget requirements. Effective power management demands more functionality in the headstage design like power level detection for range estimation and power save modes for sleep-wake operation. This paper proposes a single chip ASIC solution that addresses these problems by incorporating digitally programmable features and thus has the potential to enable wireless powering for many implantable systems. The ASIC includes an RF rectifier which has a peak efficiency of 17.9% at 900MHz and 11.0% at 2.4GHz, a robust 1V bandgap reference and LDO voltage regulator whose output can be programmed in the range of 1V-1.5V, and can drive upto 4mA of load current. The input RF power level detector has a threshold of 1.6V and the power management block can be programmed to give a 6%, 12.5% or 25% duty cycle power line to the transmitter resulting in upto 60% reduction in average power. The ASIC was fabricated using the TSMC 65nm process, occupies 1mm 2 die area and the headstage consumes 300A at 1.2V regulated supply.
AB - Wireless powering holds immense promise to enable a variety of implantable biomedical measurement systems with different power supply and current budget requirements. Effective power management demands more functionality in the headstage design like power level detection for range estimation and power save modes for sleep-wake operation. This paper proposes a single chip ASIC solution that addresses these problems by incorporating digitally programmable features and thus has the potential to enable wireless powering for many implantable systems. The ASIC includes an RF rectifier which has a peak efficiency of 17.9% at 900MHz and 11.0% at 2.4GHz, a robust 1V bandgap reference and LDO voltage regulator whose output can be programmed in the range of 1V-1.5V, and can drive upto 4mA of load current. The input RF power level detector has a threshold of 1.6V and the power management block can be programmed to give a 6%, 12.5% or 25% duty cycle power line to the transmitter resulting in upto 60% reduction in average power. The ASIC was fabricated using the TSMC 65nm process, occupies 1mm 2 die area and the headstage consumes 300A at 1.2V regulated supply.
KW - implantable biomedical system
KW - power gating
KW - programmable ASIC
KW - wireless RF powering headstage
UR - http://www.scopus.com/inward/record.url?scp=84055192815&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84055192815&partnerID=8YFLogxK
U2 - 10.1109/IEMBS.2011.6091359
DO - 10.1109/IEMBS.2011.6091359
M3 - Conference contribution
C2 - 22255613
AN - SCOPUS:84055192815
SN - 9781424441211
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 5617
EP - 5620
BT - 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011
T2 - 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011
Y2 - 30 August 2011 through 3 September 2011
ER -