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Power amplifier and method for carrying out power amplification

A power amplifier and power output technology, which is applied in the direction of power amplifiers, amplifiers, push-pull amplifiers, etc., can solve the problem that the level separation module cannot handle DC signals, etc., and achieve push-pull output and high-power output without distortion Effect

Active Publication Date: 2017-09-22
黄承伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, image 3 and Figure 4 The level separation module is not capable of handling DC signals

Method used

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  • Power amplifier and method for carrying out power amplification
  • Power amplifier and method for carrying out power amplification
  • Power amplifier and method for carrying out power amplification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Figure 5 It is a simplified diagram of an equivalent structure of a power amplifier according to an embodiment of the present invention, and Output represents the output terminal. Such as Figure 5 versus Picture 9 As shown, the power amplifier of the present invention shown includes: a level separation module W, which can separate a signal to be amplified W1 and output a positive level W4 and a negative level W5; a first power output module M1 and a second power output module M1 The power output module M2 has exactly the same structure, and both can be equivalent to an N-channel field effect transistor. Figure 5 Only two equivalent N-channel field effect transistors corresponding to the two power output modules M1 and M2 are shown in the figure, but this does not mean that the two power output modules of this embodiment are only composed of two N-channel field effect transistors.

[0051] As mentioned above, the structure of the first power output module M1 and the seco...

Embodiment 2

[0072] On the basis of the power amplifier shown in the first embodiment, it may also include a pre-amplification module FD, such as Picture 11 Shown. It can amplify the input signal to obtain a voltage signal W1 and input it to the level separation module W. The preamplifier module FD can be composed of integrated circuits and transistor discrete components, which can amplify signals not greater than 10Vpp up to 700Vpp to obtain a high output voltage, and the Vpp refers to the peak-to-peak value of the voltage.

Embodiment 3

[0074] On the basis of the power amplifier shown in the first embodiment, it can also include a rectifier module ZL, such as Picture 11 Shown. It can rectify and filter the input city power to obtain a direct current, and use this to supply power to the first and second power output modules. The rectifier module may be any type of AC-DC conversion circuit (AC-DC) such as a half-wave rectifier circuit, a full-wave rectifier circuit, and a full-bridge rectifier circuit.

[0075] It can be seen from the above that the power amplifier shown in the above embodiments can achieve distortion-free amplification of signals, and the achievable performance indicators are:

[0076] 1. The maximum output voltage is 700Vpp (peak-to-peak value).

[0077] 2. The input waveform is reproduced without distortion, and the total harmonic distortion (THD) is less than 3%.

[0078] 3. The output voltage slew rate (Slew Rate) is 50V / us.

[0079] 4. Load type: resistance, capacitance, inductance.

[0080] The...

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PUM

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Abstract

The invention provides a power amplifier and a method for carrying out power amplification. The power amplifier comprises a level separation module which can separate and output a positive level and a negative level; and a first power output module and a second power output module, wherein each power output module comprises K field effect transistor units which are mutually connected in parallel, each power output module is equipped with a module source, a module drain and a module gate, the module gates of the first power output module and the second power output module are correspondingly connected with the positive level and the negative level separated by the level separation module, each field effect transistor unit comprises m N-channel field effect transistors, a drive circuit and a substrate. The m N-channel field effect transistors are connected in parallel to form a public source, a public drain and a public gate. The former two power modules carry out linear amplification under the interaction of the level separation module, push pull output is realized, crossover distortion is overcome, and the distortionless high power output is realized.

Description

Technical field [0001] The invention relates to the technical field of low-frequency power amplification, in particular to a power amplifier in the DC-20kHz frequency band and a method for power amplification. Background technique [0002] At present, power amplifiers are needed in many fields, such as radio frequency power amplifiers for wireless transmission, audio power amplifiers for entertainment, etc.; and in high-power driving fields such as circuit simulation and circuit testing, high-power driving sources are needed to drive these high-power For loads, such as the power required for the test of the aircraft power input terminal is 90kW, the power required for the simulation of the wind power generation system is 1MW, and the power required for the simulation of the all-electric ship is 4MW. However, in the above-mentioned various application scenarios, the output power of the signal test generator is relatively small. Therefore, it is necessary to use a super power ampli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/21H03F3/26
CPCH03F3/211H03F3/26H03F2203/30051Y02D30/70
Inventor 黄承伟
Owner 黄承伟