Discrete Opamp - Maker Factory ELECTRONICS EXPERIMENTS BOX Manual

2.97 Discrete OPAMP

Circuit 205: Discrete Operational amplifier
Setup information
Install the three transistors and the two resistors as shown in Fig. 2.205 followed by ten jumper wires.
Check the placement on the board again and only then connect the battery.
Experiment
If everything is wired correctly, you will have a simple operational amplifier. The next experiment shows
what you can do with it.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.205.
230
Components required:
2 x 2N3904 transistors,
1 x 2N3906 transistor,
1 x 22 Ω resistor, 1 x 2.2 kΩ
resistor, 1 x breadboard,
1 x 9V battery with clip
connector
Fig. 2.205: Discrete Operational
amplifier