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Class A push-pull amplifier

A push-pull amplifier and amplifier technology, applied in the field of amplifiers, can solve problems such as poor signal quality

Inactive Publication Date: 2016-06-08
DEVIALET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power of the amplifier is very high, but the quality of the signal is usually poor

Method used

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  • Class A push-pull amplifier
  • Class A push-pull amplifier

Examples

Experimental program
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Embodiment Construction

[0027] like figure 1 As shown, a push / pull amplifier 10 according to the invention comprises an input 12 for the audio signal to be amplified, and an output 14 for the amplified signal.

[0028] This output 14 is connected to a loudspeaker 16 which forms the load (indicated by a resistor) of the amplifier. The input terminal 12 of the amplifier is capable of receiving a control voltage, the reference voltage of the control voltage is ground voltage, and the control voltage is derived from figure 1 The sound reproducing system represented by generator 17 in.

[0029] As this is known per se, a push / pull amplifier comprises two amplifier transistors 18, 20 of the MOSFET type along a DC voltage V + and V - The main amplification branches between the two buses are connected in reverse series. The drain of each transistor 18, 20 is respectively connected to the voltage V + and V - , and the sources are connected together at the output of the amplifier 14.

[0030] The gate o...

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PUM

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Abstract

The invention relates to a “push-pull” amplifier, comprising an input (12) and an output (14), which includes: a main amplification branch comprising two amplification transistors (18, 20) connected in opposite series between two supply voltages (V+, V−), the amplifier output (14) being connected between the two transistors (18, 20), and a control circuit (22, 24) for each amplification transistor (18, 20) connected to the input (12) to each receive as an input the signal to be amplified. The main amplification branch comprises, between each transistor (18, 20) and the output (14), a member having a nonlinear response (38, 40) and means (30, 32) for introducing at the input of the control circuit (22, 24) of each transistor (18, 20), a nonlinear compensating signal suitable for bringing about the circulation of a minimum current in the member having a nonlinear response (38, 40).

Description

technical field [0001] The present invention relates to an amplifier of the push / pull type, in particular to a class A audio amplifier comprising an input and an output, the class A audio amplifier comprising: [0002] a main amplification branch comprising two amplification transistors in anti-series between two supply voltages, the output of the amplifier being connected between the two transistors; and [0003] A control circuit for each amplifying transistor, the control circuit being connected to the input such that each amplifying transistor receives as input the signal to be amplified. Background technique [0004] Audio amplifiers are divided into several classes, which correspond to different amplification modes, resulting in different performances in terms of power and quality. [0005] A Class A amplifier is one in which the active amplifying element, consisting of transistors, is constantly on, and thus operates in linear mode all the time. Therefore, it is pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/30
CPCH03F3/3018
Inventor 马西亚斯·摩仁瓦利皮埃尔-埃马纽埃尔·卡莫
Owner DEVIALET