Peak value suppression power amplifier system based on current negative feedback circuit

A current negative feedback, power amplifier system technology, applied in transducer circuits, electrical components, sensors, etc., can solve problems such as signal distortion and signal distortion, achieve stable closed-loop gain, eliminate the influence of open-loop gain, and avoid signal distortion. Effect

CN107682782AInactive Publication Date: 2018-02-09CHENGDU SAIPUQI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-02-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a peak suppression power amplifier system based on a current negative feedback circuit. Capacitor C1 as the input terminal of the power amplifier system, one end is connected to the negative pole of capacitor C1, the other end is grounded resistor R1, the negative pole is grounded, and the positive pole is connected to the power amplifier circuit after resistor R10. Capacitor C5 is connected in series to the negative pole of capacitor C1 It consists of a current negative feedback circuit between the static bias circuit and a peak clipping circuit connected to the power amplifier circuit. The invention has a stable static working point, thereby ensuring that the waveform of the amplified signal is the same as that of the signal before amplifying, avoiding signal distortion caused by signal distortion after amplifying, and greatly improving the quality of sound playback.
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Description

technical field

[0001] The invention relates to a power amplifier system, in particular to a peak suppression power amplifier system based on a current negative feedback circuit. Background technique

[0002] The power amplifier system is the most basic equipment in the audio system. Its task is to amplify the weak electrical signal from the signal source to drive the speaker to emit sound. However, there is a big problem in the existing power amplifier system, that is, the amplified signal tends to be distorted to varying degrees, which leads to signal distortion and seriously affects the auditory effect. Contents of the invention

[0003] The purpose of the present invention is to overcome the defect that the current power amplifier system easily distorts the signal after amplifying the signal, resulting in signal distortion, and provides a peak suppression power amplifier system based on a current negative feedback circuit.

[0004] The purpose of the present invention...

Examples

Embodiment

[0018] Such as figure 1 As shown, the present invention mainly consists of a static bias circuit, a power amplifying circuit connected to the static bias circuit, a capacitor C1 whose negative pole is connected to the static bias circuit, and whose positive pole is used as the input end of the power amplifier system, and one end is in phase with the negative pole of the capacitor C1. connected to the resistor R1 with the other end grounded, the negative electrode grounded, the capacitor C5 connected to the power amplifier circuit after the positive electrode passes through the resistor R10, the current negative feedback circuit connected in series between the negative electrode of the capacitor C1 and the static bias circuit, and the power It consists of a peak clipping circuit connected to an amplifying circuit. The input terminal of the low distortion power amplifier system of the present invention is connected with an external signal source.

[0019] Among them, the static...