VMOS Power Transistors in Audio Amplifiers
Power MOS devices have become more available and capable in recent years. Although their major application is as a high-speed switch, it will be shown that they are excellent as class AB output devices in power linear amplifiers. They are more durable, linear, versatile, and provide far greater frequency response than bipolar power transistors commonly available. MOS devices are still relatively new and do not enjoy the low costs of bipolar devices, unfortunately. MOS devices are fundamentally different from bipolars in operation as well, and new circuits must be developed to take advantage of their characteristics. Hopefully time will permit their application to amplifiers of lesser cost.
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