Preamplifiers for electrophysiology, and for brain research

The actual choice of the preamplifiers manufactured by SUPERTECH:

All of them can be built with

    - single-ended input

    - differential inputs

    - monopolar or differential (switchable)

All of them can be AC or DC-coupled

    - with manual capacity neutralization

    - with automatic capacity neutralization

    - with built-in analogue impedance meter

    - built for remote digital impedance meter (located in the main amplifier)

    - with manual capacity neutralization and built-in analogue impedance meter

    - with automatic capacity neutralization and built-in analogue impedance meter

    - with manual capacity neutralization and for remote digital impedance meter

    - with automatic capacity neutralization and for remote digital impedance meter

Head Amplifiers (very small)

    - Monopolar (choice: 1 - 16 channels)

    - Differential (choice: 1 - 16 channels)

    - ECG cable-end version (3 - 12 channels)

An example:

Single-channel Monopolar Preamplifier for BioAmp

        Click on the picture to get it in full size

Quality assurance:

The crucial features of the amplifier ICs, what are continuously developed by the semiconductor manufacturers are:

    - Noise (signal to noise ratio)

    - Offset voltage

    - Offset drift (thermal stability)

    - Input bias current

    - Transient response

    - Bandwidth (slew rate)

The topology of the electronic amplifier circuits are similar at the different amplifier manufacturers. The differences are arisen from the different IC models used in the preamplifiers. Our engineers make huge efforts to learn, measure, and compare the newest ICs of different semiconductor manufacturers. SUPERTECH changes the IC models used in the preamplifiers, if a better IC model appears on the market. In this way the most sophisticated ICs are implemented in our preamplifiers always.