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RP Metrix Three Motor Microelectrode Headstage Systems

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Three-Drive Neural Implant System

ND3HS1 Headstage ND3 System
figure 1 (click to enlarge)
Figure 2 (click to enlarge)

The system consists of the following components:

• The microdrive. (see Fig. 1) The microdrive is implanted on the animal. It has 3 micromotors. Each motor moves a shuttle with submicron resolution. The shuttle can carry up to three metal electrodes (maybe four, depending on electrode diameter).

• A signal buffer and flexible cable. This is attached to the microdrive during recording. The signal buffer is the first stage of signal amplification and processing. The buffer has unity voltage gain.

• A 12-channel differential preamplifier. This is the next stage of signal amplification. Each differential amplifier has a voltage gain of 100 and a band pass from sub Hz to over 20 KHz. Each amplifier scales up the difference between its electrode signal and one of several references.

• The rotational commutator. The multichannel preamplifier hangs from the rotational commutator, so that the cable is allowed to rotate freely and avoid twisting.

• The preamplifier interface (distribution box). The rotational commutator is connected by 25-conductor cable to the distribution box. The distribution box routes 12 signal channels to the data acquisition system. It is also has an option to send four of 12 channels to external  amplifiers for signal visualization or audio monitoring. It also provides the connections for the amplifier/buffer power supply and microdrive motor controller. The microdrive motor controller can be completely disconnected from the commutator cable to prevent noise pick up.

• The microdrive motor controller, supporting 3 motors in the headstage.

• A DC Power Supply. This provides 5 volts to the preamplifier interface, which in turn provides ±15 volts for the preamplifier and buffer.

Please see our Specifications  page for more details.