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Triangular wave generation circuit and and power amplifier based on triangular wave generation circuit

A technology for generating circuits and triangular waves, applied in power amplifiers, pulse generation, electrical components, etc., can solve the problems of affecting the sound playback effect, the sound amplification area cannot be amplified normally, and the difficulty of canceling high-order spectral components, so as to improve anti-noise. The effect of the ability to interfere

Inactive Publication Date: 2017-06-09
CHENGDU DESHANNENG TECH CO LTD
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Problems solved by technology

The disadvantage is that the spectral regeneration component is less improved, and it is difficult to cancel the high-order spectral component
[0003] In the existing playback equipment connected to multiple power amplifiers, when one of the power amplifiers fails, the speaker connected to the power amplifier cannot emit sound, resulting in the failure of the sound amplification area where the speaker is located. Affect the overall playback effect

Method used

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  • Triangular wave generation circuit and and power amplifier based on triangular wave generation circuit
  • Triangular wave generation circuit and and power amplifier based on triangular wave generation circuit

Examples

Experimental program
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Effect test

specific Embodiment 1

[0024] Such as figure 1 As shown, a triangular wave generating circuit includes a threshold comparison module and a linear charging and discharging module; the threshold comparison module includes a comparator threshold comparison module; the negative input terminal of the comparator inputs a reference voltage, and the positive input terminal is connected to the output terminal Linear charging and discharging module.

[0025] The linearity of the triangular wave is an important part to measure the quality of the whole system, because the part behind the triangular wave will also introduce greater distortion. If the linearity of the triangular wave generated by this part is not good enough, it will bring great distortion.

[0026] An op amp and a comparator are used to form a triangular wave generator circuit. We can see that the OPA365 is responsible for linear charge and discharge, while the previous TLV3501 is responsible for threshold comparison, thus generating a very line...

specific Embodiment 2

[0030] On the basis of the first embodiment, the linear charge and discharge module is an operational amplifier linear charge and discharge module; the negative input terminal of the operational amplifier is connected to the output terminal of the comparator, and is connected to the positive terminal of the comparator through a resistor R1 The input terminals are connected; the positive input terminal of the operational amplifier is connected with the reference voltage.

specific Embodiment 3

[0032] On the basis of the second embodiment, the negative input terminal of the comparator is connected to the output terminal of the operational amplifier through the potentiometer RP.

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Abstract

The present invention provides a triangular wave generating circuit and a power amplifier based on the triangular wave generating circuit. The triangular wave generating circuit includes a threshold comparison module and a linear charging and discharging module; the threshold comparison module includes a comparator threshold comparison module; the comparator The reference voltage is input to the negative input end of the negative pole, and the positive input end and output end are connected to the linear charging and discharging module. The invention adopts a piece of operational amplifier and a piece of comparator to form a triangular wave generating circuit, so as to generate a very high linearity triangular wave.

Description

technical field [0001] The invention relates to a triangular wave generating circuit and a power amplifier based on the triangular wave generating circuit, in particular to a triangular wave generating circuit and a power amplifier based on the triangular wave generating circuit suitable for power amplifier devices. Background technique [0002] At present, the linearization techniques of power amplifiers can be divided into four types: power back-off method, feedback method, pre-distortion method and feed-forward method. The power back-off method is the simplest method to improve the linearity of the power amplifier, but its essence is to sacrifice the DC power consumption to improve the linearity, which greatly reduces the efficiency of the power amplifier, and the effective power is only 1%-5%. The feedback method is to use the nonlinear distortion signal output by the amplifier to offset part of the nonlinearity of the amplifier itself. The disadvantage is that the gain ...

Claims

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Application Information

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IPC IPC(8): H03K4/06H03F3/20
Inventor 曾丽
Owner CHENGDU DESHANNENG TECH CO LTD
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