title: Design of a pulse-triggered four-channel functional electrical stimulator using complementary current source and time division multiplexing output method.
abstract: In this paper, a four-channel pulse-triggered functional electrical stimulator using complementary current source and time division output method is proposed for the research and application of functional electrical stimulation (FES). The high-voltage compliance and output impedance is increased by adopting the complementary current source, which can also realize the linear voltage-to-current conversion and high channel isolation. A high-voltage analog switch chip MAX14803, combined with a FIFO queue algorithm in the microprocessor, is used to setup the H-bridge and multiplexers for the four-channel time division multiplexing output. With this method, the size and cost of the key components are reduced greatly. The stimulating core circuit area is 30 × 50 mm(2). According to the experiments, the stimulator can achieve the four-channel charge-balanced biphasic stimulation with a current range between 0 and 60 mA and a single-phase pulse amplitude up to 60 V.
authors.forename: Hai-Peng
authors.initials: HP
authors.lastname: Wang
authors.forename: Zhi-Gong
authors.initials: ZG
authors.lastname: Wang
authors.forename: Xiao-Ying
authors.initials: XY
authors.lastname: Lü
authors.forename: Zong-Hao
authors.initials: ZH
authors.lastname: Huang
authors.forename: Yu-Xuan
authors.initials: YX
authors.lastname: Zhou
mesh_terms: D017097:Electric Impedance; D011211:Electric Power Supplies; D004599:Electric Stimulation Therapy / Q000295:instrumentation*; D004566:Electrodes; D006429:Hemiplegia / Q000628:therapy; D006801:Humans; D008838:Microcomputers; D012984:Software