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.
Based on components from Linear Technology, we find this circuit in a 2005 manual. The circuit...
This circuit triggers oscillator 555 when the supply voltage drops below the value set in the pot....
This amplifier provides a power near to 1W. The supply must be made with a voltage of 9 V coming...