The invention discloses a power
amplifier circuit powered by a single power supply based on an MOS
transistor. The circuit comprises a power amplification circuit and an intermediate
amplifier. The power amplification circuit is electrically connected with the intermediate
amplifier, the power amplification circuit comprises a positive half-cycle power amplification circuit, a negative half-cyclepower amplification circuit and an
impedance matching output transformer, and a class B single-power-supply
transformer coupling push-pull power analog
linear amplification circuit is formed by connecting power MOS single tubes or multiple tubes with the same characteristics in parallel; the intermediate amplifier comprises an
output feedback detection circuit, a proportional integral differentiating circuit, a positive and negative half-cycle balance and
crossover distortion correction circuit and a protected positive and negative half-cycle
voltage follower circuit. The power amplifier circuit is directly installed in a power amplifier, a
voltage type MOS tube is adopted as a power tube, a front end circuit is simple and reliable, universality is large, the size is small, reliability ishigh, power matching is simple, and the power amplifier circuit is particularly suitable for a broadcast power amplifier
machine requiring
alternating current and
direct current, and full-power outputthe same as that of
alternating current power supply is kept during
direct current power supply.