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.
This circuit beeps when the sensor is triggered by the opening of the freezer door or other...
The circuit shown in the figure has an output voltage rise time of 0.22 ms and an input time...
This circuit was found in the power semiconductor manual of the 1980s ON Semiconductor. The...