StimPulse Stimulator

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StimPulse Stimulator

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The neuro/Craft™ StimPulse Electrical Stimulation System is comprised of two devices, the PGM Pulse Generator Module and the ESG Electrical Stimulus Generator, that deliver isolated electrical stimulation in a wide range of user-defined timing and pulse parameters.

Flexibility

The Pulse Generator Module (PGM) provides a broad spectrum of timing control parameters, from simple to complex, without the need for additional channels or devices. A wide range of waveforms are supported including monophasic or biphasic square, charge-balanced biphasic, ramp, sine, zeta, and multi-level rectangular. Arbitrary waveforms are easily imported or exported from Matlab, or similar general-purpose waveform editors, through USB port connections. Simple or complex pulse timing trains of 1 microsecond resolution are created through an intuitive, graphical interface, or imported through the USB.

An onboard digital signal processor (DSP) performs real-time control of the operation. The PGM is fully customizable through simple firmware updates using provided USB ports. Additional USB interfaces to a PC, external storage device, keyboard and mouse are also provided.

The PGM’s intuitive user interface supports straightforward creation and storage of multiple user presets. Easy import/export functionality allows sharing of these presets between devices, as well as convenient storage. FHC maintains a growing library of downloadable preset files. Custom preset programming is available by request from FHC Technical support.

Performance

The ESG Electrical Stimulus Generator delivers a galvanically isolated constant current or voltage with a compliance range of +/-125V. User-configurable features include AC/DC output coupling and mulitiple chassis shielding options. The ESG additionally includes ground shunts during low use periods to prevent leakage and noise artifacts.

Safety

To protect subjects, the ESG and PGM automatically shut off if output exceeds set voltage/current parameters. The mini transformers provide high output isolation characteristics. The microelectrode cabling is designed with “No Touch” connections.

Feature Rich

The compact PGM may be rack mounted or set on a desktop. The ESG is linked to the PGM by a 3m data cable, allowing placement close to the preparation. Digital inputs include programmable triggering options and outputs conveniently link to recording and behavioral systems. The PGM may also provide timing for other lab devices. The touch screen interface doubles as a graphic display of the ideal or actual output during the experiment. A secondary analog output of the ideal or actual stimulus output is provided for viewing or recording.

PGM:

Timing Range: Accurate timing specifications for the PGM are depedent on the load, and are given under the stimulus generator device (ESG etc.)
Train Cycles: 1 - 2.1*109
Pulse Type: Square, ramp, sine, zeta, or custom
Pulse Phase: Monophasic, biphasic, or charge-balanced
Pulse Polarity: Positive (+) or Negative (-)
Cycle Latency: <1µsec between cycles
Timing Resolution: 1µsec, better than 100ppm
Digital Trigger In Latency: <10µsec
Touchscreen Area: 11.5cm X 8.2cm (4.5” x 3.2”) +/-0.25"
Touchscreen Resolution: 640X480 Color (256) min.
PC Interface: USB 2.0 Type B port
Data Port: 2ea. USB 2.0 Type A ports
Power Requirements: 100-240 VAC, 50-60Hz
Dimensions: Height: 13cm (5.22") / Width: 23cm (9") / Length: 24cm (9.6") / Weight: TBD
Mounting Options:
Tabletop, 4 rubber feet prevent sliding
Rack mountable with SAF Rack Frame (Cat. #55-11-0 Available separately)

ESG:

Note: All timing measurements made from 10% - 90% amplitude of leading edge under 100k load

Isolation Method: Digital, using micro-transformers
Isolation Impedance: >1011 Ohms @ 60Hz
Isolation Barrier Capacitance: <25 pF
Isolation Voltage: 4000VAC
Train Time: 1ms – 596.5hrs(24days) at 1ms resolution (continuously adjustable)
Cycle Time:
    Constant Current Mode: 15µs - 59.6hrs
    Constant Voltage Mode: 4µs - 59.6hrs in 0V-10V range; 60µs - 59.6hrs in 10V-125V range (continuously adjustable, on-the-fly adjustable)
Pulse Delay: 5us – 35min at 1us resolution(on-the-fly adjustable, continuously adjustable)
Pulse Duration:
    Constant Current Mode: 15µs - 5.9hr
    Constant Voltage Mode: 4µs - 5.9hr in 0V - 10V range; 60µs - 5.9hr in 10V – 125V range. (continuously adjustable, on-the-fly adjustable)
Constant Voltage Ouput: 0 - 125V at 1µA (1Meg load); (continuously adjustable, on-the-fly adjustable)
Constant Current Ouput: Four ranges, 0 – 10 uA, 0 – 100 uA, 0 – 1mA, 0 – 10 mA, (continuously adjustable, on-the-fly adjustable)
Compliance Voltage: +/-125V (10uA and 100uA range) +/-100V (1mA and 10mA ranges)
Ouput Impedance: <1k
Leakage Current: <10 nA
Noise: <1% of range (current or voltage)
Dimensions: Height: 4.5cm (1.77") / Width: 8cm (3.15") / Length:16.5cm (6.5") / Weight: 2lbs
Mounting Options: Tabletop, 4 rubber feet prevent sliding.

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