This is a small 12W audio amplifier over a load of 8 Ω, that combining the NE5534 integrated with a pair of V-MOSFET transistor output stage technology as we get excellent sound performance. MOSFET 2SK135 / 2SJ50 from Hitachi is used in this circuit. Input sensitivity of the circuit is 3V RMS maximum, the distortion factor is 0.002% at 1 kHz, and the frequency response is 15 Hz to 100 kHz. (-3dB).
This circuit requires a symmetrical (dual polarity) power supply with voltage output +/- 25V and the current output should be 2A maximum.
12W Audio Amplifier Components List:
| R1 = 33 kΩ | C1 = 1nF 63V | D1 = 1N967B zener 18V 0.5W |
| R2 = 6.8 kΩ | C2 = 47 ÂuF 40V | D2 = 1N967B zener 18V 0.5W |
| R3 = 22 kΩ | C3 = 100 nF 63V | D3 = 1N4148 |
| R4 = 100 kΩ | C4 = 100 nF 63V | D4 = 1N4148 |
| R5 = 1 kΩ | C5 = 47 ÂuF 40V | Q1 = 2SK135 MOSFET |
| R6 = 330 Ω | C6 = 4.7 pF ceramic | Q2 = 2SJ50 MOSFET |
| R7 = 1 kΩ | C7 = 100 ÂuF 40V | IC1 = NE5534 |
| R8 = 10 kΩ | C8 = 100 ÂuF 40V | |
| R9 = 0.47 Ω 2W | ||
| R10 = 0.47 Ω 2W | ||
| R11 = 10 kΩ |
Power Supply Specification:
Voltage: Symmetrical 25V
Current : 1A – 2A Max
MOSFET 2SK135 and 2SJ50 Datasheet Downloads:
This is the circuit diagram of power amplifier 45W using power uPC 1230 as the…
The Horn Circuit This is a basic circuit of car horn and lamp flasher that…
This is the circuit diagram of drinking water alarm based a small water sensor by…
Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…
This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…
This is an active stereo tone control circuit using very well known op-amp IC of…
