In circuits 1, 2, and 3, the LM386 inputs are connected directly across the tank circuit and use the LM386 as an RF envelope detector. Circuit 4, with its relatively large value coupling capacitor, ...

LM386 audio amplifier circuit schematic. Advertisement. The external parts shown on diagram 3.1 can be selected to get the desired gain. Circuit A will give a voltage amplification of 200. Circuit B ...

Figure 3a shows a NE555-based dc-dc converter, while Figure 3b uses the LM386. The circuit with the NE555 provides less total output current and power compared to the circuit using the LM386.

The audio amplifier is a simple LM386 circuit. The real work is in the input stage and the new AGC circuit. ... Between a series of diagrams and live scope demonstrations, ...