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Reducing Pulse Width to 100m
seconds
The previous versions of the stimulator were limited to a minimum pulse width of 1.0 milliseconds. In order to work within the confines of the data acquisition system, new hardware was developed that would generate a pulse width of 100 microseconds (0.0001 seconds). |
The Prototype Hardware
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Pulse width is now controlled via hardware with software controlling the frequency and voltage. The prototype system to the left consists of a power supply that delivers DC voltages of +175 volts and –25 volts. An oscilloscope was used to verify the proper pulse was being generated. |
The Two Stages of the Pulse Generation
High Voltage Amplifier Stage
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The new system consists of two separate stages that are responsible for controlling either the output voltage or the generating the 100m second pulse. The amplifier stage receives a 0-10 volt DC voltage signal that it
amplifies to the voltage computed by the software that is to be delivered
to the patient. |
Pulse Width Generation Stage |
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In order to generate a 100m second pulse, a signal from the computer is sent to the circuit which is then analyzed and synchronized in order to send the pulse to the patient. |
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