Manish Srivastava, Kilian ODonoghue, Aleksandr Sidun, H Alexander Jaeger, Alessandro Ferro, Daragh Crowley, Christian van den Bosch, Marcus Kennedy, Daniel OHare, Padraig Cantillon-Murphy
This paper presents a compact and low-cost on-chip sensor and readout circuit. The sensor achieves high-resolution 5-degrees-of-freedom (DoF) tracking (x, y, z, yaw, and pitch). With the help of an external wire wound sensor, it can also achieve high-resolution 6-degrees-of-freedom (DoF) tracking (x, y, z, yaw, pitch, and roll angles). The sensor uses low-frequency magnetic fields to detect the position and orientation of instruments, providing a viable alternative to using X-rays in image-guided surgery. To measure the local magnetic field, a highly miniaturised on-chip magnetic sensor capable of sensing the magnetic field has been developed incorporating an on-chip magnetic sensor coil, analog-front end, continuous-time ΔΣ analog-to-digital converter (ADC), LVDS transmitter, bandgap reference, and voltage regulator...
April 3, 2024: IEEE Transactions on Biomedical Circuits and Systems