This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in documentation from the 90s. The bipolar transistor is a general purpose type.
The battery charger suggested in the figure has its current limited by resistor R1. This component may...
Found in Electronics now, this circuit generates signals given by the formulas next to the...
In the figure we have a practical circuit for a 50 kHz bandwidth amplifier using a photo diode as...