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Voltage and current double-feedback amplification circuit, power amplifier and earphone

An amplifying circuit, voltage and current technology, applied in the direction of negative feedback circuit layout, etc., can solve the problems of user inconvenience, inconvenient replacement, single feedback form of the amplifying circuit, etc., to achieve the effect of expanding the use width and the best use effect.

Inactive Publication Date: 2020-08-25
臧厚宁
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that the feedback form of the amplifying circuit is single, inconvenient for replacement, and inconvenient to the user, the present invention provides a voltage-current double-feedback amplifying circuit, a power amplifier and earphones, which have realized the same The dual feedback of voltage and current in the amplifying circuit expands the use width of the amplifying circuit, enables users to obtain the best use effect, and provides users with convenience and other features

Method used

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  • Voltage and current double-feedback amplification circuit, power amplifier and earphone
  • Voltage and current double-feedback amplification circuit, power amplifier and earphone
  • Voltage and current double-feedback amplification circuit, power amplifier and earphone

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0035] refer to figure 1 As shown, the embodiment of the present invention provides a voltage and current double feedback amplification circuit for amplifying audio signals, including: a positive period amplification module, a negative period amplification module and a feedback module;

[0036] The positive period amplifying module includes: a first amplifying circuit, a second amplifying circuit, a third amplifying circuit and a fourth amplifying circuit;

[...

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Abstract

The invention relates to a voltage and current double-feedback amplification circuit, a power amplifier and an earphone. A positive period amplification module and a negative period amplification module are adopted to form a push-pull type amplification circuit. Voltage, current and power amplification is carried out on a positive period signal and a negative period signal of an audio signal stepby step, so that the signal amplification requirement can be met; meanwhile, a change-over switch in the feedback module is used; the forms of voltage feedback and current feedback in the amplifying circuit are selected. A user can select an appropriate feedback form to amplify the audio signal according to own preferences and audio characteristics, double feedback of voltage and current in the same amplification circuit is realized, the use width of the amplification circuit is expanded, the user can obtain an optimal use effect, and convenience is provided for the user.

Description

technical field [0001] The invention belongs to the technical field of power amplifier circuits, and in particular relates to a voltage and current double feedback amplifier circuit, a power amplifier and earphones. Background technique [0002] At present, the negative feedback circuits used in audio amplifier circuits mainly include three types: the first is a voltage negative feedback circuit, the second is a current negative feedback circuit, and the third is a negative feedback circuit without a large loop. The first is the most common). Because the working state of the third circuit is not very stable in specific applications, the third feedback circuit is not commonly used. The main use is the first two kinds of voltage negative feedback and current negative feedback. The voltage negative feedback circuit and the current negative feedback circuit have their own advantages and disadvantages. The feedback circuits used in the existing earphones and other products are e...

Claims

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Application Information

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IPC IPC(8): H03F1/34
CPCH03F1/34
Inventor 臧厚宁
Owner 臧厚宁
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