EXT-02 B

EXT-02B - 2-Channel Extracellular Amplifier


  • Two recording channels with stimulus control, differential INPUT(S)
  • One power supply for up to four EXT-02 B amplifiers, one REL-08 B and one AUD-08 B system
  • Two different OUTPUTS:

    • DC with GAIN x10 and OFFSET control, range ± 500 mV
    • AC with GAIN x10 to x10k, HIGHPASS and LOWPASS filtered

  • HIGHPASS filter (AC): 0.1, 1, 10, 30, 100, 300 Hz
  • LOWPASS filter (AC): 500, 1k, 3k, 5k, 10k, 20k Hz
  • NOTCH filter (AC and DC): 50 Hz or 60 Hz, activated by switch
  • MONITORS (telegraphs) for filters and gain
  • External STIMULUS input with 2 mm banana jacks, STIMULUS CONTROL with switch or TTL signal
  • Data bus connection to AUD-08 B and REL-08 B

Available headstages:

  • Standard headstage with one, two or four channels
  • Standard headstage with direct stimulation through the same electrode
  • Miniature headstage with one, two, four, six or eight channels (via breakout box)
  • Miniature headstage with direct stimulation via separate electrode or switchable
  • Tetrode miniature headstage with four channels


Part No. Description
EXB-EXT-02B Two channel extracellular amplifier (Master System)
EXB-EXT-02BS Two channel extracellular amplifier (Slave System)
EXB-HS Standard headstage for EXT-02B amplifiers
EXB-AUD-08B AUD-8B Desktop Audio Monitor System
EXB-REL-08B REL-08B Electrode Resistance Test Unit
EXB-EH Electrode holder for EXT-02B headstage (please specify glass diameter)

Technical Data

Input (headstage):
>1012 W, range ±1 V

Differential Input:
CMR >90 dB at 1 kHz (tested with 0 W input resistance)

Input Capacitance:
30 pF

OFFSET compensation:
set by potentiometer, range: ±1 V

single pole, attenuation: -6 dB / octave,
|corner frequencies (Hz): 0.1, 1, 10, 30, 100, 300

single pole, attenuation: -6 dB/octave,
corner frequencies (Hz): 500, 1k, 3k, 5k, 10k, 20k

rotary-switch 10-100-1k-10k

range: ±10 V into 1 kW / ±1 V into 50 W

Power Supply:
18V, AC, min. 1.5 A

305 x 180 x 105 mm³ (W x D x H)



Input (headstage):
>1012 W, range ±1 V

Headstage Size:
70 x 26 x 26 mm3

Holding Bar:
length: 150 mm; diameter: 8 mm