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6.2 BioMuse

The BioMuse system is a complete bioelectric controller system. All bioelectric signals that can be measured from the surface of the skin can then be used to control the computer. The system is composed of 8 instrumentation amplifier circuits (IA) in order to measure 8 bioelectric signals simultaneously. The amplified signal from the electrodes is then sent to a programmable gain amplifier (PGA). The total gain is: tex2html_wrap_inline2088 Where tex2html_wrap_inline2090 and tex2html_wrap_inline2092 can be programmed from 1 to 100. Thus the maximum tex2html_wrap_inline2094 . The signal is then sampled at a rate of tex2html_wrap_inline2096 . This signal is then processed by a specialized digital signal processing microprocessor in order to filter the signal and perform certain pattern recognition operations. This processed signal is then sent at 19.2kBaud to the computer using an optically isolated serial channel. The optical isolation is important to protect the user from voltage spikes coming from the computer.

Tim Stilson
Thu Oct 17 16:32:33 PDT 1996