MOSFET Power Amplifier Circuit diagram
Two complementary MOSFETs are used to deliver 20W into 8Ω.
| PARTS LIST | |
| R1 | 100kΩ |
| R2 | 10kΩ |
| R3 | 240Ω (120Ω + 120Ω) |
| R4 | 330Ω |
| R5 | 1.3kΩ (1.2kΩ + 100Ω) |
| R6 | 1.3kΩ (1.2kΩ + 100Ω) |
| R7 | 100Ω |
| R8 | 1kΩ |
| R9 | 100Ω |
| R10 | 100kΩ |
| R11 | 22kΩ |
| VR1 | 1kΩ |
| T1 | 2N3904 |
| T2 | 2N3904 |
| T3 | IRF9520 |
| T4 | IRF520 |
| IC1 | TL071 |
| LS1 | 8Ω 20W Speaker |
T3
T4
The MOSFETs should be heatsinked with a heatsink of better than 5°C/W capability.
A TL071 op amp is used as an input amplifier.
THD is less than 0.15% from 100Hz to 10kHz.
Please send your ideas, which are very important for our success…
does this amp is working
i want to 1000 pmpo watt diagram.