ER-1 Differential Extracellular Amplifier

The ER-1 is a compact, inexpensive, and versatile amplifier which is primarily intended for extracellular use. The ER-1 offers a number of both high and low pass filtering settings and a range of gains. The remote headstage has high imedance differential inputs and includes a bypass relay to connect the electrode to an auxiliary instrument such as a stimulator.

• DC coupled differential headstage
• High input impedance...1000 GigaOhms
• Input range...+/-1Volt max.
• Capacitance neutralization for noninverting input
• BNC type input connector accepts various electrode holders
• Sharp 4 pole high pass filter settings of DC, .1, 1, 10, 100, and 300 hz
• DC offset control
• Auto zero feature subtracts electrode potential from input before amplification
• Input bypass switch for stimulation
• Gain settings of X100, 200, 500, 1k, 2k, 5k, 10k, and 20k
• Sharp 4 pole low pass filter settings of .1k, .3k, 1k, 3k, 10k, and 30k Hz
• Line frequency notch filter
• Output impedance...50 Ohms
• Low noise...10 microvolt pp at 10KHZ