An integrated circuit of a receiver-stimulator has been designed for a multiple-channel electronic cochlea using a combination of full-custom and semi-custom design strategies
The IC mainly contains a data receiver
a decoding circuit
a control signal generator
a supply voltage monitor
an error detector
a programmable current source and an output switching network. It has two stimulation modes
256 levels of output current and 22 outputs for electrodes. All of the analog and digital circuits have been fabricated using a standard 3-μm CMOS P-well process technology. The chip area is 12. 5mm2.
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