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…)

10 watts Mosfet Audio Amplifier

10 watts Mosfet Audio Amplifier
The scheme presented here is a MOSFET 10W audio amplifier circuit which requires only single power supply. Single rail supply is rarely used in Class-B power amplifiers. Anyway, it's good enough for low power applications. In fact, this circuit is taken from old cassette player that still works. (more…)

100W Basic MOSFET amplifier

100W Basic MOSFET amplifier
This Basic MOSFET amplifier is very simple to build and low cost. Is perfect for Hi-Fi amplifiers and instrument amplifiers (guitar, keyboards ...). Output power is + / - 100 Wrms at 8 ohm load or + / - 160 Wrms below 4 ohms. The simplicity of this circuit cause distortion + / -0.1%. Bandwidth at -3 dB is from 4 Hz to 96 Khz and it is limited by C1, R1, R2 and C2. (more…)

25 Watt Power Amplifier based MosFet

25 Watt Power Amplifier based MosFet
25 Watt power amplifier based MosFet,  can be connected directly to the signal source and does not require pre-amplifier to drive. The amplitude of the input signal must reach the level of 200 mV. This signal is normally present on the linear output recorder, CD player, computer sound card and other devices. To adjust the volume can be placed at the entrance to the potentiometer 10 kohm. Trimmer adjustable quiescent current. It must be within 100 mA. (more…)