Amplifier board

Hello, human. I bring to your attention a small report on the two-channel EEG amplifier board designing.

Compared with the simulated circuit diagram (see previous post), I used trimming resistors in the input gain control circuit (instrumentation amplifier). Thus, it is possible to calibrate the amplifier for measurement with high accuracy, or to change the range of the measured signals. The input bus line supports working with active electrodes, for which the power bus line is connected. To shield the circuit nodes, the entire board will be hidden from both sides by metal covers (see next post). Since the area of the intended application of the board is a mobile system, the board size was reduced as much as possible, and amounted to 26.5mm * 34.8mm. The height of the board will be determined after the end of the protective covers design. Below you can see a diagram and a drawing of some layers of the printed circuit board, also I made a couple of 3D board models.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s