Si-C Mosfets on Yin – Yang and P-Stone
Audiozen started with an idea, sharing passion through innovation;
Audiozen is growing, listening to your feedback to do better;
Audiozen bets on its choices, getting better targets through innovation.
Audiozen started over 10 years ago with an approach to Hi-Fi more philosophical than technical, searching for the best sound combining tradition and new technologies.
Audiozen decided to use a new device called Si-C Mosfet for Mono and P-Stone power amplifiers.
Silicon carbide (Si-C), also known as carborundum, is a semiconductor containing silicon and carbon. In 1893 Ferdinand Henri Moissan discovered the very rare naturally occurring Si-C mineral while examining rock samples found in the Canyon Diablo meteorite in Arizona. The mineral (the second hardest natural mineral) was named moissanite in his honor.
The main features and benefits of Si-C mosfets include:
- Very high temperature handling capability leading to simplified thermal management as well as improved system reliability;
- Significantly minimal variation versus temperature resulting in more compact designs (smaller heatsinks);
- Higher system efficiency.
Usually solid state amplifiers run complementary devices in n-channel and p-channel guise but Si-C mosfets are available only as n-channel versions. Hence Audiozen developed a quasi-complementary circuit with just n-channel parts like great companies did in the early 70s, when p-channel power devices were still unavailable. It seems strange but it’s easier to find and match two nearly equal n-channel parts than two complementary versions. After several tests on many Si-C mosfets made by several manufacturers, best devices have been chosen for Audiozen’ Mono and P-Stone power amplifiers.
About 50 years ago, Mr. Baxandall discovered that a diode at a very precise point of a quasi-complementary circuit eliminates the local Miller effect to obtain superior linearity at high frequencies.
It seems strange again but in many amplifiers with a quasi-complementary circuit, this Baxandall diode never appears. In Mono and P-Stone power amplifiers that Baxandall diode is present.
So by combining a traditional quasi-complementary circuit, Baxandall diode, and the innovative modern Si-C mosfets devices, Audiozen created Mono and P-Stone, the first power amplifiers equipped with silicon carbide mosfets.
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