Title :
A novel charge-metering method for voltage mode neural stimulation
Author :
Luan, Song ; Constandinou, Timothy G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London, UK
Abstract :
This paper presents a novel, fully-integrated circuit for achieving change-balanced voltage-mode neural stimulation based on a charge-metering technique. The proposed system uses two small on-chip capacitors, a counter, two comparators and a control-logic circuit to measure the charge delivered to the tissue. This has been designed to deliver a maximum charge stimulus of 10.24 nC within 100 μs. Simulated results show a charge delivery error of 0.4-4% and a maximum residual charge of -73 pC. Implemented in 0.18 μm CMOS, the total power consumption is 42 μW.
Keywords :
CMOS integrated circuits; bioelectric potentials; biomedical engineering; capacitors; comparators (circuits); neurophysiology; CMOS; charge metering method; charge stimulus; comparators; control logic circuit; fully integrated circuit; on-chip capacitor; power consumption; residual charge; voltage mode neural stimulation; Capacitance; Capacitors; Delay; Electrodes; Logic gates; Power demand; Radiation detectors;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6271737
