Last Updated on March 16, 2024
Simple two stage resistor capacitor coupled low power audio amplifier using npn transistor BC547 designed, This circuit works with 12 Voltage bias and two transistors are placed in common emitter configuration.
When we apply audio input signal the first stage transistor amplifies the applied signal with 180° phase shift and then second stage transistor also amplifies the signal with 180° hence we receive 360°(0 phase shift) amplified signal at output.
Components List
| S.No | Name | Quantity |
| 1. | Transistors(NPN) BC547 | 2 |
| 2. | Capacitors 1uF | 2 |
| 3. | Capacitor 47uF | 1 |
| 4. | Resistors 4.7K & 1.2K | each 2 |
| 5. | Resistors 2.2K & 10K & 470R & 3.3K | each 1 |