12W FET audio amplifier

12W FET audio amplifier
This is a small 12W power amplifier on a load of 8 Ω, that combining the NE5534 integrated technology with transistors as V-MOSFET output stage get an excellent sound quality. The input sensitivity is 3V rms maximum, the distortion factor is 0.002% at 1 kHz, and frequency response is 15 Hz to 100 kHz. (-3dB). (more…)

50 watt Mosfet amplifier

50 watt Mosfet amplifier
The first stage of the 50 watt Mosfet amplifier is a differential amplifier based on transistors Q1 and Q2. Capacitor C8 is the DC input decoupling, C1 R1 limits input current and a capacitor bypasses undesirable high frequencies. The second stage is composed of the pilot phase transistors Q3 and Q4. The output stage is a complementary push-pull stage based on MOSFET  IRF9530 and IRF530. (more…)