g.HIamp: Specs & Features

Groundbreaking technology for brain mapping

High demands require high level solutions and groundbreaking technology. g.HIamp is a 256 channel biosignal amplifier for invasive and non-invasive measurements of brain functions that is FDA cleared and CE approved. The amplifier has 256 ADC converters with 24 Bit inside for perfect signal resolution and has a wide input sensitivity to measure EEG, ECoG, ECG, EMG, EOG without any saturation. External sensors can also be connected. All channels are DC coupled. Internally, signal processing is performed with the fastest floating point DSP and a sophisticated Linux Kernel. The amplifier relies on a very high oversampling to reduce the noise as much as possible by averaging samples.

256 channels can be analyzed in real-time with the g.tec Highspeed Processing for Simulink toolbox. This leads to faster and more accurate control of brain-computer interface systems that use Common Spatial Patterns (CSP).

g.HIamp is powered by a medical mains power supply and the system is connected to the computer via USB. The system is equipped with 16 digital trigger channels and a HOLD input for artifact suppression (e.g. during electrical or magnetic stimulation).

g.HIamp provides 80, 144 or 256 channels per unit. 80 and 144 channel systems can also be upgraded later on. Each block of 64 channels is connected via a multi-pole medical safety connector to the electrode interface box. 

A big advantage is that g.HIamp can be used with passive or active electrodes. The difference is just the electrode connector box (headbox). For ECoG grids and strips, special interface connectors are available.

NEW: A g.HIamp-RESEARCH version for reseach purpose only is available now! Find more information under: g.HIamp-RESEARCH

Buy a g.HIamp and get the Wolpaw BCI book for free! More Details

Product Highlights

  • 256 channels perfectly synchronized with 24 Bit
  • Supports active and passive EEG electrodes and ECoG grids
  • FDA cleared, CE certified medical product
  • Fully integrated into g.tec software components for real-time analysis 
  • Integrated impedance measurement for active and passive electrodes

EXPERT QUOTES

"g.HIamp allows us to perform robust intraoperative recordings to ensure cortical and subcortical electrodes are placed in correct functional regions for various clinical applications and research directions at the University of Florida Hospital."

 - Dr. Aysegul Gunduz (University of Florida), US

"The g.HIamp is an absolute workhorse and a critical component of our ECoG program.  Its recording and hardware and software interfacing capabilities make it extremely versatile."

 - Dr. Gerwin Schalk
   (Wadsworth Center, Albany Medical Center), US

"Fused with a variety of rapid prototyping and research software tools, g.HIamp serves as a unique tool in our clinical research applications to record electrocorticogram and local field potentials. The oversampling process executed by the internal DSP provides exceptional SNR and enables capturing higher frequency brain rhythms with superior quality."

  - Dr. Nuri Firat Ince (University of Houston, US)


MORE PRODUCT DETAILS

INPUT CHANNEL PROPERTIES

g.HIamp uses wide-range DC-coupled amplifier technology in combination with 24-bit sampling. The result is an input voltage of +/- 250 mV with a resolution of <60nV! This means that every electrophysiological signal can be recorded directly without additional hardware. Neither high electrode offset voltage nor large artifacts resulting from electrical or magnetic stimulation will saturate the amplifier inputs. This feature is important for various artifact treatment and correction algorithms. The use of digital filters avoids hardware related variations between channels.

ACCURACY AND DATA QUALITY

The amplifier drives each ADC at 614,4 kHz, which is much higher than the required sampling frequency. Then the floating point DSP internally performs the oversampling and averages samples to increase the signal-to-noise ratio. For example, if the amplifier operates at 256 Hz, then 2400 samples are averaged per data point, which suppresses the noise by a factor of 49. In addition, the floating point DSP also performs real-time bandpass filtering and notch filtering of the data. Several hundred different bandpass filters are predefined. Also, bipolar derivations can be calculated by the DSP to work with a very high CMRR.
The amplifier uses 256 ADC for the 256 channels, and hence all signals are sampled exactly at the same time point to avoid any time delay between channels. This is especially important for brain mapping procedures.

ADD MORE CHANNELS

g.HIamp can be ordered with 64+16, 128+16 or 256 channels initially. The 64+16 channel version comes with one 64 and one 16 channel connector box. The 128+16 version comes with two 64 channel and one 16 channel connector box and the 256 channel version comes with four 64 channel boxes. Later on, if more channels are required, the amplifier can be upgraded by adding more amplifier channels. This makes it easy to start with an inexpensive system.

SKIN-ELECTRODE IMPEDANCE

g.HIamp uses a new principle for impedance measurement that can determine the skin-electrode impedance for passive and also for active electrodes. It works also for gel or dry electrodes provided by g.tec, and even for ECoG grids. The impedance values are color coded, and all 256 channels are shown in one window, which is updated every few seconds! The impedance check can also beep if an electrode was successfully mounted. This allows very fast assembly of electrodes during real-time impedance control. 

SOFTWARE OPTIONS

g.tec's philosophy is to provide a broad spectrum of software solutions for different groups of users (e.g. for engineers, researchers & scientists, physiologists, and medical staff, but also for software developers & programmers). From comfortable Windows-based recording software to MATLAB/Simulink based tools and device drivers and APIs, you will find the appropriate tools for your application. Please see the list of related products/software below for more details. g.HIamp is also supported and integrated into the main core of BCI2000.

IMPORTANT INFORMATION

We give a full 5-year warranty on g.HIamp. g.HIamp is a safe certified medical device for research in humans, even for invasive recordings such as electrocorticography (ECoG). It must not be used for patient monitoring or determination of brain death. Medical diagnosis and decisions about treatment of diseases must not be based (solely) on results obtained with this device.


CONNECT ACTIVE/PASSIVE ELECTRODES

A brilliant feature of the g.HIamp is that the main amplifier unit can be used with different electrode connector boxes. Therefore, the main amplifier unit is only purchased once and can be used for many different applications:

  • passive electrode connector box - comes with 64 channels and is connected to one of the 4 groups of the g.HIamp. It can be used with standard 1.5 mm safety connectors, which are standard for EEG and ECoG electrodes.
  • active electrode connector box - comes with 64 channels and is connected to one of the 4 groups of the g.HIamp. It has 2-pin connectors to support all g.tec active electrodes, such as g.LADYbird or g.SCARABEO (not for medical use).
  • passive electrode connector box with 16 channels - comes with 16 channels and is connected to one of the 4 groups of the g.HIamp. This connector box can provide additional inputs for external sensors.


Available configurations

Complete Solutions

product no.: 8018 read more g.HIamp 80 bundle — bundle offer consisting of: g.Hiamp 80, g.Power - g.HIamp, g.HEADbox - active, g.HEADbox16 - passive, g.SCARABEO 64 bundle, g.Recorder, trigger cable for g.Hiamp, g.BSanalyze: (Base + EEG), g.GAMMAgelSET
product no.: 8017 read more g.HIamp 144 bundle — bundle offer consisting of: g.Hiamp 144, g.Power - g.HIamp, 2x g.HEADbox - active, g.HEADbox16 - passive, g.SCARABEO 128 bundle, g.Recorder, trigger cable for g.Hiamp , g.BSanalyze: (Base + EEG), g.GAMMAgelSET
product no.: 8016 read more g.HIamp 256 bundle — bundle offer consisting of: g.HIamp 256, g.Power - g.HIamp, 4x g.HEADbox - active, g.HEADbox16 - passive, g.SCARABEO 256 bundle, g.Recorder, trigger cable for g.Hiamp , g.BSanalyze: (Base + EEG), g.GAMMAgelSET

Hardware and Accessories

product no.: 7012 read more g.HIamp 80 UPGRADE to 144 — upgrade g.HIamp from 80 to 144 channels
product no.: 7014 read more g.HIamp 144 UPGRADE to 256 — upgrade g.HIamp from 144 to 256 channels
product no.: 7016 read more g.HIamp 80 UPGRADE to 256 — upgrade g.HIamp from 80 to 256 channels
product no.: 8006 read more g.HIamp package BCI — upgrade for BCI research consisting of: g.HIamp SIMULINK HIGH-SPEED ONLINE Processing; g.HIamp P300 + Ping Pong + SSVEP model; g.HIamp common spatial patterns; g.RTanalyze; g.BSanalyze (Base + EEG + Classify)
product no.: 8020 read more g.HIamp AEP Setup — complete setup for auditory stimulation experiments with g.HIamp; consisting of: ASSR, BAEP, AEP stimulation unit; audio trigger cable for g.HIamp; Lecture 4: Evoked potentials; bundle offer (0150, 7240, 4053)

See some related products

Hardware and Accessories

product no.: 7282 read more g.HIamp USB cable — connection of g.HIamp to USB-port of PC/notebook
product no.: 7225 read more g.HIamp cable for short-cut function (HOLD) — 3m cable with 3pin screw terminal
product no.: 7240 read more audio trigger cable for g.HIamp — DIG IN 1 of g.HIamp HA-xxxx.xx.xx to 2 pole 1/4" connector for AudioFire2 external sound card
product no.: 7276A read more trigger cable for g.HIamp for DIG IN 1 — trigger cable for g.HIamp for DIG IN 1 (8 digital lines from DIG IN 1 g.HIamp HA-xxxx.xx.xx to D_Sub 25 male (PC-parallel-port pinout), 3 m)
product no.: 7276B read more trigger cable for g.HIamp for DIG IN 2 — trigger cable for g.HIamp for DIG IN 1 (8 digital lines from DIG IN 2 g.HIamp HA-xxxx.xx.xx to D_Sub 25 male (PC-parallel-port pinout), 3 m)
product no.: 7051 read more g.HIamp water-proof heavy duty case — water-proof heavy duty case for g.HIamp equipment
product no.: 7004 read more g.Power - g.HIamp — medical grade-PSU (power supply unit) for g.Hiamp; 110/230 V; 50/60 Hz power line; single 5 V supply
product no.: 7005 read more g.HEADbox - active — electrode interface box for 64 active channels, for usage with g.HIamp; works with g.tec 2 pin safety connector active electrodes; g.INTERfaceHEADbox2HIamp (7008); g.HEADboxPOWER (7009)
product no.: 7006A read more g.HEADbox - passive — electrode interface box for 64 passive channels, for usage with g.HIamp; works with 1.5 mm medical safety connector passive electrodes; g.INTERfaceHEADbox2HIamp (7008)
product no.: 7006B read more g.HEADbox - passive — electrode interface box for 64 passive channels, for usage with g.HIamp or g.USBamp for synchronized recordings of g.tec systems and clinical systems; works with 1.5 mm medical safety connector passive electrodes; 2 grounds; g.INTERfaceHEADbox2HIamp (7008)
product no.: 7007 read more g.HEADbox16 - passive — electrode interface box for 16 passive channels, for usage with g.HIamp; works with 1.5 mm medical safety connector electrodes
product no.: 7008 read more g.INTERfaceHEADbox2HIamp — interface cable g.HEADbox to g.HIamp with multi pole connector; approx. 165 cm lead
product no.: 7009 read more g.HEADboxPOWER — power supply cable for g.HEADbox; approx. 165 cm lead
product no.: 7277 read more adapter cable for trigger cable — DSUB25 female to 8xBNC (including 8xBNC to CINCH adapter)
product no.: 0307C read more external trigger button HA — external trigger button for g.HIamp, connected to PIN 1 of DI 1; 2,5 m cable
product no.: 3012 read more medical isolation transformer — 600 VA, REO-MED, 6 outputs
product no.: 0274d read more g.TRIGbox for g.HIamp — 3 x 4 trigger inputs for analog, optical and digital trigger signals; adjustable thresholds; 1 x analog encoded output; cable for 3 x trigger output included
product no.: 0268a read more g.Power - for g.TRIGbox — medical mains power supply for g.TRIGbox; 110/230 V; 50/60 Hz power line; single 9 V supply
product no.: 0269 read more g.TRIGbox, push-button — bounce-free, to record subject responses, 1.8m cable
product no.: 0271 read more g.TRIGbox, microphone — to trigger on acoustic events, 1.8 m cable
product no.: 0270 read more g.TRIGbox, optical trigger sensor — for screen marker or strobe lamp detection, 1.8 m cable

Electrodes and Sensors

read more g.Electrodes: Specs & Features — various active and passive electrodes for electrophysiological recordings
read more g.SAHARA: Specs & Features — active dry EEG electrode system
read more g.GAMMAsys: Specs & Features — active electrode system for EEG/EMG/EOG/ECG
read more g.Sensors: Specs & Features — various sensors for physiological and physical signals

Software

product no.: 0111 read more g.RTanalyze: Specs & Features — real-time biosignal processing blockset under SIMULINK; real-time algorithms
product no.: 7263 read more g.HIamp C API — driver software package for g.HIamp; full access to recording buffer; for user specific applications on the PC; sophisticated data acquisition and processing software almost under any programming language
product no.: 7263a read more g.HIamp C API + BCI2000 — application programming interface (API) for the user specific application (eg. developed in C/C++); BCI2000 driver; BCI2000 software package
product no.: 0139d read more g.HIamp P300 model — 8-channel P300 based speller
product no.: 0261D read more g.HIamp API for MATLAB — MATLAB programming driver package for g.HIamp
product no.: 0140d read more g.HIamp Ping Pong model — 2 subject and 4-channel motor imagery based game; prerequisite: SIMULINK HIGH-SPEED ONLINE Processing (0260d)
product no.: 0260d read more Highspeed Online Processing Under Simulink for g.HIamp — SIMULINK driver and blockset modules; data processing with maximum system speed
read more g.NEEDaccess — network enabled easy data access
product no.: 6305 read more g.NEEDaccess API — g.tec general device data access interface; application programming interface
product no.: 0311 read more g.DISTRIBUTEDeeg — allows you to record biosignal data from different distributed PCs (DataPCs) in the network and transmit the recorded data to a central evaluation / data storage PC (EvalPC).
product no.: 0264 read more g.UDPinterface: Specs & Features — data exchange with network connection between Simulink/MATLAB on different PCs (eg. BCI, VR, XVR, ...); single place licence; prerequisite MATLAB for OS English Win 32/64, SIMULINK
product no.: 0291 read more g.EYEtracking Interface for SIMULINK — read eyetracking information into Simulink
product no.: 0148 read more ACTOR BCI - Application ConTrol and Online Reconfiguration (ACTOR) protocol — Simulink model with matrix interface that can be remotely updated or configured with configuration files; sends commands to external devices
product no.: 0147 read more hybrid BCI model — SSVEP and P300 hybrid based control; prerequisite SIMULINK HIGH-SPEED ONLINE Processing, g.RTanaylze
product no.: 0149 read more EMG/EOG/mouse control — Simulink model to control the matrix interface with EMG, EOG or a mouse
product no.: 0146 read more hyperscanning BCI model — multi-user P300 and Motor Imagery based control; prerequisite SIMULINK HIGH-SPEED ONLINE Processing, g.RTanalyze, g.BSanalyze Base, EEG and Classify Toolbox
product no.: 0144 read more g.VIBROTACTILEp300 Model — 2-, 3- and 8-channel vibrotactile P300 based BCI control; prerequisite: SIMULINK HIGH SPEED ONLINE Processing, g.BSanalyze Base, EEG and Classify Toolbox
product no.: 0141d read more g.HIamp SSVEP BCI model — 8 channel SSVEP based control; prerequisite SIMULINK HIGH-SPEED ONLINE Processing for g.HIamp, g.RTanalyze
product no.: 1303d read more SSVEP model and Hardware for g.HIamp — bundle for SSVEP based robot control; consists of g.HIamp SSVEP model, g.SSVEPbox, g.STIMbox and small robot with bluetooth interface
product no.: 0142b read more g.HIamp common spatial patterns — Simulink model to calculate CSPs for 2 or 3 classes; variable number of electrodes, tutorial
product no.: 0137 read more g.BCI SOCI model — Screen Overlay Control Interface module; can be used especially for virtual reality (VR) applications and remote control of devices to provide the standard user interface by directly embedding the BCI stimuli; generates CVEP or SSVEP stimuli and supports single symbol and row column for P300 stimulation. single place licence; prerequisite MATLAB R2014a for OS English Win 64 (Windows 7), SIMULINK HIGH-SPEED ONLINE Processing, g.BSanalyze Base, EEG and Classify Toolbox
product no.: 0112 read more g.MONcreator — Allows defining electrode positions, names and constellations for source derivations. By using the Polhemus Patriot Digitizer, g.MONcreator allows users to read the real coordinates of the electrodes placed on a cap.
product no.: 0136 read more g.BCI CVEP model — Code-based BCI model; BCI systems can also use pseudo-random stimulation sequences on a screen (code-based BCI); prerequisite SIMULINK HIGH-SPEED ONLINE Processing, g.BSanalyze Base, EEG and Classify Toolbox

Complete Solutions

read more g.PHYSIOobserver: Specs & Features — Classify workload, emotions, movements based on physiological parameters in real-time
product no.: 8030 read more RehaBCI for g.HIamp — 80 channels; consisting of: g.HIamp 80; g.HIamp 80 package ACTIVE; g.HIamp SIMULINK High-Speed Online Processing; g.RTanalyze; g.BSanalyze: Base, EEG and Classify-toolbox; g.HIamp common spatial patterns model; g.VRsys; g.UDPinterface; 3D human avatar (g.AVATAR); business PC; bundle offer

Related Media and Documents

Product Manuals/Handbooks

g.HIamp

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gHIamp_InstructionsForUse_CE — 24/08/2015 — 1.31 MB
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gHIamp_InstructionsForUse_USA — 24/08/2015 — 1.31 MB

Tutorials

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application/pdf
64-Channel Flash VEP Experiment using g.HIamp — 27/07/2012 — 2.33 MB