The SIU91 is a precision isolated constant current type stimulator which is variable by a +3 to +10 volt external pulse. The power to this unit can be supplied by an external power pack or by an internal rechargeable battery. All timing is controlled by the external gate pulse generator such as the Cygnus Technology PG4000A. The SIU91 utilizes a Cygnus manufactured ultra high isolation DC-to-DC convertor which eliminates the need for expensive battery replacement.
 
Features:
Gated constant current source
High compliance voltage (>100VDC)
Leakage current less than 1 microamp
Current set by precision 10 turn dial
Up to 10 mA pulsed current output
External power supply included
Internal rechargeable battery for even lower noise operation
10 microsecond pulse rise time
Output short circuited when pulse off
DC to DC converter operates at 125Khz
Residual noise is outside of the range of most biological signals