Low distortion power amplifier system based on current negative feedback circuit

A current negative feedback, power amplifier system technology, applied in transducer circuits, low-frequency amplifiers, sensor protection circuits, etc., can solve problems such as signal distortion, signal distortion, etc., to achieve stable closed-loop gain, improve quality, and improve stability.

CN105978504AInactive Publication Date: 2016-09-28成都特普瑞斯节能环保科技有限公司
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-09-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a low-distortion power amplifier system based on a current negative feedback circuit. The capacitor C1 as the input end of the power amplifier system is composed of a resistor R1 whose one end is connected to the negative electrode of the capacitor C1 and the other end is grounded. The present invention has a stable static operating point, thereby ensuring that the waveform of the amplified signal is the same as that of the signal before amplification, avoiding signal distortion caused by signal distortion after amplification, and greatly improving the quality of sound playback.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a power amplifier system, in particular to a low-distortion 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 low-distortion power amplifier system based on a current negative feedback circuit.

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

Examples

Embodiment

[0015] 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, the other end of the resistor R1 is grounded, the negative electrode is grounded, the positive electrode is connected to the power amplifier circuit after the resistor R10, and the current negative feedback circuit is connected in series between the negative electrode of the capacitor C1 and the static bias circuit. The input terminal of the low distortion power amplifier system of the present invention is connected with an external signal source.

[0016] Among them, the static bias circuit consists of transistor VT1, transistor VT2, transistor VT3, transistor VT4, transistor VT5, tran...