Bioelectric Signal Amplifier Modules

Bioelectric Signal Amplifier modules

EMGA

ElectroMyoGram Amplifier Module type 691

This module is especially designed to amplify EMG signals. A floating input circuit is used to avoid hum and grounding problems. A bargraph display is integrated in the module to visualize the EMG signal. The filters are designed for EMG signals up to 10 kHz. The analog EMG 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 0.3 mV and 1mV amplitude is incorporated for calibration. For EMG integration an envelope integration circuit is provided. This signal is also available on the front panel and on the PLUGSYS bus.

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 connections correspond to those of the standard 3-pin EMG input cable

Input impedance 10 000 MOhm

Common mode rejection 106 dB

Filters Low-pass filter (HIGH CUT OFF) 10 kHz, 3 kHz, 1 kHz, 0.3 kHz
High-pass filter (LOW CUT OFF) 50 Hz, 25 Hz, 10 Hz, 2 Hz

Envelope curve (leakage time constant) 0.2 s, 0.5 s, 1 s

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

Outputs BNC connector on the front panel for EMG and envelope signal (±10 V), the output signals are also available on the PLUGSYS system bus

Calibration square-wave signal generator with amplitudes of 0.3 mV and 1 mV amplitude

Recorder output The internal outputs are connected to the bus system via jumpers. The EMG signal and the envelope signal are connected to the recorder via a Recorder Output Module ROM. It is also possible to connect a recorder directly to the BNC connectors “EMG OUT” and “ENVELOPE INTEGRATION” at the front panel

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

Power supply 5 V/600 mA, 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 connections correspond to those of the standard 3-pin EMG input cable
Input impedance	10 000 MOhm
Common mode rejection	106 dB
Filters	Low-pass filter (HIGH CUT OFF) 10 kHz, 3 kHz, 1 kHz, 0.3 kHz High-pass filter (LOW CUT OFF) 50 Hz, 25 Hz, 10 Hz, 2 Hz
Envelope curve	(leakage time constant) 0.2 s, 0.5 s, 1 s
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
Outputs	BNC connector on the front panel for EMG and envelope signal (±10 V), the output signals are also available on the PLUGSYS system bus
Calibration	square-wave signal generator with amplitudes of 0.3 mV and 1 mV amplitude
Recorder output	The internal outputs are connected to the bus system via jumpers. The EMG signal and the envelope signal are connected to the recorder via a Recorder Output Module ROM. It is also possible to connect a recorder directly to the BNC connectors “EMG OUT” and “ENVELOPE INTEGRATION” at the front panel
Quick start	for rapid discharge of the coupling capacitors by pressing the QUICK START key
Power supply	5 V/600 mA, 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