Source-electrode-free high-power field-effect tube complementary output circuit

Abstract

The invention provides a source-electrode-free high-power field-effect tube complementary output circuit. The circuit mainly comprises a field-effect tube complementary output branch circuit, a first field-effect tube bias branch circuit, a second field-effect tube bias branch circuit, a first voltage-sharing tube stack branch circuit, a second voltage-sharing tube stack branch circuit, a first voltage-sharing tube stack bias branch circuit and a second voltage-sharing tube stack bias branch circuit, wherein the first voltage-sharing tube stack bias branch circuit and the second voltage-sharing tube stack bias branch circuit can bear most voltage and consumption power, so that source electrode resistance of the output terminal of the field-effect tube complementary output branch circuit can be removed and low output impedance can be realized. The source-electrode-free high-power field-effect tube complementary output circuit has high current output capacity and high voltage enduring high power complementary output.

Description

technical field [0001] The invention relates to the field of complementary output circuits based on semiconductor elements, in particular to a high-power field-effect transistor complementary output circuit without source resistance, which adopts the design of no source resistance to reduce output impedance. Background technique [0002] The complementary output circuit is a common output circuit, especially in the output stage of the audio power amplifier, which is usually designed in combination with semiconductor components, such as field effect transistors and triodes. [0003] Among them, the field effect transistor is a voltage control element, which is easier to drive than the triode, so it is more favored by audio power amplifier designers in the recent new products. Large output power (such as pure class A output above 50 watts, or class A and B output of 70-700 watts or even higher) usually requires a very large current output capability. However, in the process o...

AI Technical Summary

Problems solved by technology

[0005] 2. The withstand voltage of high-current FETs is usually relatively low. According to the traditional complementary output design, the power supply voltage cannot be raised to the required voltage for high-power output.

It is necessary to select dozens of pairs of symbol requirements from thousands of pairs of transistors, which greatly increases the cost

Images