Ultrasonically powered and controlled microsystem for dual-wavelength optogenetics with a multiload regulation scheme
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Date
2023-01-25
Authors
Rashidi, Amin
Zamani, Milad
Mondal, Tanmay
Hosseini, Seyedsina
Laursen, Kjeld
Corbett, Brian
Moradi, Farshad
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
This letter presents an ultrasonically powered dual-wavelength optogenetic device that targets simultaneous excitation and inhibition of neural activities, or in a broader sense, optical stimulation in two distinct wavelengths for targeting different populations of neurons. This can be applied to a variety of neurological disorders. The device features a load regulator circuit that shares the available power budget between two μ LEDs in a power-efficient and controlled way suppressing the need for adaptive matching and overvoltage protection circuits. Furthermore, the regulator circuit is capable of detecting power burst availability on the device and generating a control signal, accordingly. For 5.25 -mW acoustic power at the device’s surface, the rectified voltage, and the total current load of the system are regulated to 2.79 V and 600 μA , respectively. The maximum chip and device efficiencies of 92.5% and 31.8% are measured, respectively. The total die area in 180- nm CMOS technology nose and the estimated system volume are 0.16 mm2 and 0.572 mm3 , respectively.
Description
Keywords
Aperture efficiency , Dual-wavelength optogenetics , Dust , Load regulator , Piezoelectric , Ultrasonic power transfer
Citation
Rashidi, A., Zamani, M., Mondal, T., Hosseini, S., Laursen, K., Corbett, B. and Moradi, F. (2023) 'Ultrasonically powered and controlled microsystem for dual-wavelength optogenetics with a multiload regulation scheme', IEEE Solid-State Circuits Letters, 6, pp.33-36. https://doi.org/10.1109/LSSC.2023.3239601
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