Power amplifier circuit powered by single power supply based on MOS transistor

A MOS tube and power amplifier circuit technology, applied in the field of power amplifier circuits powered by a single power supply, can solve the problems of high cost, low reliability, inconvenient installation, etc., and achieve the effects of convenient parallel use, high reliability and simple structure

Pending Publication Date: 2020-11-20
杭州声博电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in ordinary class AB power amplifier circuits, the most commonly used power tube is a current-type power triode, which is usually used in pairs of NPN and PNP, and uses +/- dual power supply for power supply. For some applications that require DC power supply (such as fire emergency broadcasting Power amplifier, etc.), one is a built-in DC/DC conversion circuit, which converts a single DC power supply into a dual power supply, the DC power supply efficiency is low, the circuit is complicated, and the reliability is not high; the other is an external DC/AC inverter, which converts the DC After turning into alternating current, it supplies power to the power amplifier, but the installation is inconvenient and the cost is high
[0003] In order to s

Method used

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  • Power amplifier circuit powered by single power supply based on MOS transistor
  • Power amplifier circuit powered by single power supply based on MOS transistor
  • Power amplifier circuit powered by single power supply based on MOS transistor

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Embodiment Construction

[0033]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] The present invention provides such as Figure 1-9 A power amplifier circuit based on a single power supply powered by a MOS tube is shown, including a power amplifier circuit and an intermediate amplifier. The specific operation steps are as follows:

[0035] S1: The power amplifying circuit is a transformer-coupled push-pull power analog linear amplifier whose power device is a MOS tube. The power amplifying circuit includes a positive half-cycle power...

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Abstract

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.

Description

technical field [0001] The invention relates to the field of power amplifier circuits, in particular to a power amplifier circuit powered by a single power supply based on a MOS tube. Background technique [0002] At present, in ordinary class AB power amplifier circuits, the most commonly used power tube is a current-type power triode, which is usually used in pairs of NPN and PNP, and uses + / - dual power supply for power supply. For some applications that require DC power supply (such as fire emergency broadcasting Power amplifier, etc.), one is a built-in DC / DC conversion circuit, which converts a single DC power supply into a dual power supply, the DC power supply efficiency is low, the circuit is complicated, and the reliability is not high; the other is an external DC / AC inverter, which converts the DC After turning into alternating current, the power amplifier is powered, but the installation is inconvenient and the cost is high. [0003] In order to solve the above ...

Claims

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Application Information

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IPC IPC(8): H03F1/08H03F1/32H03F1/30H03F3/21H03F3/213H03F3/26H03F3/68H03F3/187
CPCH03F1/083H03F1/308H03F1/3205H03F3/187H03F3/211H03F3/213H03F3/265H03F3/68
Inventor 莫国荣鲁明祥
Owner 杭州声博电子科技有限公司
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