Bioelectric Signal Amplifier Modules

Bioelectric Signal Amplifier modules

EEGA

ElectroEncephaloGram Amplifier Module type 690

This module is especially designed to amplify EEG signals. A floating input circuit is used to avoid hum and grounding problems. A bargraph display is integrated in the module to visualize the EEG signal. The filters are designed for EEG signals up to 70 Hz. The analog EEG signal is available at a BNC connector on the front panel and also internally on the PLUGSYS system bus. Both outputs can be used for recording on a chart recorder or for data acquisition. A square-wave signal generator with amplitudes of 50 µV and 100 µV is incorporated for calibration.

Description

Input floating differential input, isolated barrier internally clamped to 300V, with protection against static discharges and 10 kHz input filter for h.f. suppression

Input connector 5-pin Binder socket with screw lock. The pin connection correspond to those of the standard 3-pin EEG input cable

Input impedance 10 000 MOhm

Common mode rejection 106 dB

Filters Low-pass filter (HIGH CUT OFF) 70Hz, 40Hz, 20Hz, 10Hz;
High-pass filter (LOW CUT OFF) 10Hz, 5Hz, 2.5Hz, 1 Hz

Filter indication by green LEDs on the front panel

Gain “GAIN” trimmer set to maximum
switch                  x1       x10        x100
in position x0.5   500     5000     50000
in position x1      1000   10000   100000
in position x2      2000   20000   200000
“GAIN” trimmer set to mimimum
switch                  x1        x10       x100
in position x0.5   100     1000     10000
in position x1      200     2000     20000
in position x2      400     4000     40000

Display Bargraph 0.75 V/LED

Output BNC connector on the front panel (±10 V ), the output voltage is also available on the PLUGSYS bus

Calibration square-wave signal generator with amplitudes of 50 µV and 100 µV

Quick start for rapid discharge of the coupling capacitors by pressing the QUICK START key

Power supply 5 V/600mA, through connector from PLUGSYS bus system

Dimensions module for PLUGSYS system, width 8E ( 40.5 mm), height 3U (128.7 mm), depth Europe size (220 mm)

Connector DIN 41612, 96-pin VG

Weight 400 g

HUGO SACHS ELEKTRONIK-HARVARD APPARATUS GmbH
Gruenstrasse 1 · D-79232 March-Hugstetten · GERMANY
Phone: +49 (0) 76 65 - 92 00-0 · Fax: +49 (0) 76 65 - 92 00-90

Description
Input	floating differential input, isolated barrier internally clamped to 300V, with protection against static discharges and 10 kHz input filter for h.f. suppression
Input connector	5-pin Binder socket with screw lock. The pin connection correspond to those of the standard 3-pin EEG input cable
Input impedance	10 000 MOhm
Common mode rejection	106 dB
Filters	Low-pass filter (HIGH CUT OFF) 70Hz, 40Hz, 20Hz, 10Hz; High-pass filter (LOW CUT OFF) 10Hz, 5Hz, 2.5Hz, 1 Hz
Filter indication	by green LEDs on the front panel
Gain	“GAIN” trimmer set to maximum switch x1 x10 x100 in position x0.5 500 5000 50000 in position x1 1000 10000 100000 in position x2 2000 20000 200000 “GAIN” trimmer set to mimimum switch x1 x10 x100 in position x0.5 100 1000 10000 in position x1 200 2000 20000 in position x2 400 4000 40000
Display	Bargraph 0.75 V/LED
Output	BNC connector on the front panel (±10 V ), the output voltage is also available on the PLUGSYS bus
Calibration	square-wave signal generator with amplitudes of 50 µV and 100 µV
Quick start	for rapid discharge of the coupling capacitors by pressing the QUICK START key
Power supply	5 V/600mA, through connector from PLUGSYS bus system
Dimensions	module for PLUGSYS system, width 8E ( 40.5 mm), height 3U (128.7 mm), depth Europe size (220 mm)
Connector	DIN 41612, 96-pin VG
Weight	400 g