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This paper presents a programmable neurostimulator 4 × VDD with 7.2 V operating voltage in a 0.18‐μm/1.8 V CMOS process. The output voltage compliance exceeds 6.2 V. A current gain control is designed to adjust bias current. A 5‐bit current mode digital‐to‐analog converter (DAC) is used to set delivered current in current driver. A high output impedance current mirror is designed to guarantee charge...
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