This project is a family of differential input amplifiers with single ended outputs for use in electrophysiology. They are all not rated for use on humans.
This is a fork of my original work here: https://github.com/EPL-Engineering/epl_bioamp
There are a few versions
EEF BioAmp "Fancy" - (master branch)
EEF BioAmp "Cheap" - (cheap branch)
The "Fancy" version has every bell and whistle we reasonably expect a user to need for doing ABR, DP, and EKG. Often these users have multiple dedicated amplifiers and prefer to use more involved filtering so that EKG signals can be seperated from ABR and etc for example. The feature set I have given it so far includes.
- Twinaxial BNC Input
- Coaxial BNC Output
- Gain of 1K/10K or Gain of 10K/100K
- LPF 3KHz/10KHz
- HPF 300Hz
- Optional the HPF can be 300Hz/10Hz
- Optional Power Line Frequency Rejection (currently 60Hz but I may do 50Hz in the future)
- Optional EPL Subrack Power
- Optional Battery Power
Please Note: The HPF option and Power Line Rejection option are mutually exclusive because of front panel constraints. Likewise the EPL Subrack Power and Battery Power are mutually exclusive because of rear panel space constraints.
The "Cheap" verion is designed to be pure minimalism. The idea was to have a lower cost version of the fancy that is just for ABR, DP, and EKG measurements. It's meant for our simple dedicated chambers where users exclusively do ABRs all day long with a single BioAmp and never adjust settings. The following is it's configuration.
- Twinaxial BNC Input
- Coaxial BNC Output
- Gain of 10K
- LPF 3KHz
- HPF 300Hz
- EPL Subrack Power
- Optional Power Line Frequency Rejection (currently just 60Hz but again I might add 50Hz later)
Please Note: The Power Line Frequency Rejection in some units is not user adjustable.
This is shared between the "Cheap" and "Fancy" versions. Like both of them it is not for use on humans. It's features include the following.
- Twinaxial BNC Output
- 3 x 5 Way Binding Post Input
- 3 x 1.5mm Male Input (DIN 42802-1 Compatible Connectors)
- Holes on the sides for Mounting to Tables and etc.
The mounting holes are more important than they might sound. In a lot of our booths the EPL Subrack the EPL BioAmp sits in is on a shelf while the subject of the testing is on a sliding optical breadboard.