- THE MJR-7-Mk3 LOW DISTORTION MOSFET AMPLIFIER.
Using only seven transistors distortion components up to 20kHz measured under 0.001%. (THD for a 20kHz input is estimated at 0.001%, but my test equipment needs improving to get a more accurate figure.) Power output is around 30W into 8ohms with a single 60V supply. The low distortion is achieved with only 100mA quiescent current, reducing the need for big expensive heatsinks.
- A HEADPHONE AMPLIFIER DESIGN.
Part 1. This is an introduction to a discrete component class-A headphone design I have been working on. It uses an active volume control to improve channel balance, and has a jfet input with optional direct coupling. Part 2 will follow eventually with a final circuit design.
- AN IMPROVED CLASS-B DESIGN:
A simple modification to a standard class-B amplifier dramatically reduces crossover distortion and eliminates the need for accurate setting of quiescent current.
- DESIGNING AUDIO POWER AMPLIFIERS.
A series of articles about low distortion power amplifier design.
- AMPLIFIER DISTORTION MEASUREMENT.
When designing low distortion amplifiers we need a means of testing them, and here an alternative to expensive test equipment is described.
