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

Journal article (2022)

Authors

Amin Safarpour Ferdowsi University of Mashhad
Farzaneh Dehnavi Ferdowsi University of Mashhad
Mehdi Saberi Ferdowsi University of Mashhad
R. Lotfi Bio-Electronics - EEMCS , Ferdowsi University of Mashhad
W.A. Serdijn Bio-Electronics - EEMCS , Erasmus MC
Research Group
Bio-Electronics (EEMCS) (TU Delft)
Copyright: © 2022 Amin Safarpour, Farzaneh Dehnavi, Mehdi Saberi, R. Lotfi, W.A. Serdijn
DOI: https://doi.org/10.1109/TCSII.2022.3161202
High-voltage analog multiplexer High-voltage analog switch Multi-electrode array Low power consumption
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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Bio-Electronics

Abstract

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.