Wireless Energy and Data Transmission ASIC for Blood Pressure Measurement in an Aneurysm Implant

Ranjan, Rajeev Kumar; John, Bibin; Gosh, Dipal; Kumar, Soumil; Saleh, Lait Abu; Schroeder, Dietmar; Krautschneider, Wolfgang H.

doi:10.5220/0005815002560262

Cited by 3 publications

(1 citation statement)

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“…As the output voltage builds up at the storage capacitor, this bias voltage increases, effectively raising the threshold voltage of the PMOS transistors, and eliminates the reverse conduction. The rectifier's first stage (S 1 ) employs a static-biasing scheme [8] at the gate of the NMOS transistors and is sized larger than the later stages (S 2 to S 11 ) because of its direct connection to the coil without the pumping capacitor C P . Isolated NMOS transistors are used to overcome the threshold voltage increase at the later stages due to body biasing.…”

Section: R P C P D Air D I Txmentioning

confidence: 99%

Low-Leakage Differential-Drive Rectifier as 13.56 MHz Inductive Energy Harvester for Deep Medical Implants with Field Exposure Compliance

Faragalla

Krautschneider

Kuhl

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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In this paper, we present a 13.56 MHz energy harvester for arterial pressure measurement implants placed at deep distances in human bodies. A 50 µm diameter thin wire is used to fabricate a 150-turn solenoid coil around a PCB stripe with a cross-sectional area of 1.35×1 mm 2 . The solenoid has a length of 12 mm, low-frequency inductance of 4.75 µH, and series resistance of 8 Ω. With this coil and an 11-stage modified differential-drive rectifier, our harvester achieved 698 nW (−31.56 dBm) sensitivity for unloaded output voltage of 1.88 V and maximum receiver efficiency of >72% at −23.5 dBm available power using 0.0228 mm 2 silicon area in 180 nm technology. A transmission distance of 21 cm was reached under compliance with the field exposure levels set by the IEEE Std. C95.1-2019.

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Section: R P C P D Air D I Txmentioning

confidence: 99%