The DS4 takes an analogue voltage waveform defined within your own data acquisition/ control system and converts it into an isolated constant current stimulus. The DS4 will accept several input voltage ranges and produces four output ranges (±10µA, ±100µA, ±1mA and ±10mA). It also features a GATE input, so that several DS4 units can be controlled by a single analogue waveform, but enabled individually via this GATE input. A timed "inactivity sensor" reduces battery usage and damaging "leak currents" during infrequent stimulation, while at the same time maintaining low levels of zero crossing distortion for repetitive waveforms. This stimulator is NOT approved for use on human subjects.



System Features

  • Standalone stimulus isolator that can output a bi-phasic isolated constant current stimulus in response to an external command voltage signal
  • Accepts a variety of voltage input ranges
  • External voltage control permits software defined waveforms
  • Isolated constant current output for low noise
  • Minimal zero crossing distortion
  • Inactivity sensor prevents unwanted DC stimulation
  • Battery test sockets


Technical Specifications


Bi-phasic constant current proportional to the input voltage

Output Ranges:

±10µA; ±100µA; ±1mA; ±10mA for a full-scale input

Output Duration:



±48V from 8x GP23A batteries


±3% of full scale output for each output range

Input IN Ranges:

±1; ±2.5; ±5; ±10 V full scale (selected by an internal jumper) with a limit of ±12V max without damage.


Included external power supply.

Please note: Important! This product is for research applications only. Not a medical device as defined in EU directive 93/42/EEC. Not designed or intended to be used for diagnosis or treatment of disease.