Speed-Power Improvement in High-Voltage Switches Employed in Multi-Electrode Arrays

Speed-Power Improvement in High-Voltage Switches Employed in Multi-Electrode Arrays

Safarpour, Amin (Ferdowsi University of Mashhad)
Dehnavi, Farzaneh (Ferdowsi University of Mashhad)
Saberi, Mehdi (Ferdowsi University of Mashhad)
Lotfi, R. (TU Delft Bio-Electronics; Ferdowsi University of Mashhad)
Serdijn, W.A. (TU Delft Bio-Electronics; Erasmus MC)

2022

In multi-electrode arrays (MEAs), for electrical recording and electrical stimulation, high voltage (HV) switches are employed to build an analog multiplexer to conduct either a HV stimulation signal from the pulse generator circuit to an electrode or a low-voltage noise-sensitive signal from the electrode to a recording stage. In this brief, a new circuit structure is proposed for HV switches that significantly improves their switching speed, reduces their power dissipation, and also employs a minimum number of bulky HV devices. In order to reduce the transition time of the proposed switch without consuming a large amount of power, during the transition time that the switch is turning on/off, a large current flows through the driver circuit of the switch to turn the switch on/off rapidly; however, after the transition times, this current is significantly reduced to save power. Based on the proposed HV switch, a multiplexer structure has been implemented in 25-V, 0.18- μm CMOS IC technology and the measurement results prove its efficacy. Supplied with 25 V and operating with 300 nA current consumption, this switch swings over 20 V with a relatively constant on-resistance of 100Ω and features a 80 ns transition time.

High-voltage analog multiplexer
high-voltage analog switch
multi-electrode array
low power consumption

http://resolver.tudelft.nl/uuid:7c1bfc3a-6720-4018-8b09-bbd9d354a7b3

https://doi.org/10.1109/TCSII.2022.3161202

2023-07-01

1549-7747

IEEE Transactions on Circuits and Systems Part 2: Express Briefs, 69 (7), 3139 - 3143

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Amin Safarpour, Farzaneh Dehnavi, Mehdi Saberi, R. Lotfi, W.A. Serdijn