HS-16-CNR Manual
This manual should be used with the Neuralynx Electrode Interface Board 16 channel (EIB-16) manual. The Neuralynx Headstage 16 (HS-16-CNR) Amplifier is the active electronic part of the Electrode Interface Board / Headstage / Tether system. It provides 16 channels of Unity Gain amplification (buffering). It also provides connections for the electrode inputs to the EIB-16 and an output connector for a 20-conductor tether.
The Headstage Amplifier size is approximately 20 mm high by 10 mm wide. Weighing only 600mg, the HS-16-CNR is a good choice for small animals. One connector on the bottom of the board is used to connect the Headstage Amplifier to the Neuralynx Electrode Interface Board. Low noise, low power, low input bias current Op amps have been used on this device instead of the traditional “Source Follower FET circuit” used in the traditional headstage amplifier design in order to:
• obtain exact unity gain which greatly improves Common Mode Rejection Ratio (CMRR)
• performance for the entire recording system for artifact and other common mode noise signal rejection;
• lower output impedance to reduce noise susceptibility of the tether and other signal cabling;
• provide integral antistatic protection on each input channel;
• insure low input bias current levels; and
• eliminate signal distortion.
Because an Op amp is used for the unity gain buffer amplifiers, special care and attention must be given to the power supply design and power application and removal sequencing. The input protection circuitry will lower the input impedance if the input voltage exceeds power supply voltage. This can occur if the input voltage exceeds the power supply voltage or by the loss of power supply voltage. The Neuralynx EEG/Reference Panel contains power supplies which properly sequence power supply voltage and monitor headstage currents.
Get pdf HS-16-CNR Manual
