Current negative feedback type low-distortion power amplifier system based on switch-on/switch-off squelch circuit

A current negative feedback, squelch circuit technology, used in low-frequency amplifiers, power amplifiers, transducer circuits, etc., can solve problems such as signal distortion and signal distortion, achieve stable closed-loop gain, eliminate the influence of open-loop gain, eliminate impact effect

CN105978506AInactive 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
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a current negative feedback low-distortion power amplifier system based on a switch machine squelch circuit, which is characterized in that it mainly consists of a static bias circuit, a power amplifier circuit connected to the static bias circuit, and a negative electrode connected to the static bias circuit. The circuit is connected, and the positive pole is used as the input terminal of the power amplifier system, such as capacitor C1. The invention can automatically perform mute when the power is just turned on, and eliminates the impact of high current on the loudspeaker when the power is just turned on, thereby protecting the loudspeaker.
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 current negative feedback low-distortion power amplifier system based on an on / off squelch 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 current negative feedback low-distortion power amplifier system based on the switch squelch circuit.

[0004] The obj...

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, and the current negative feedback circuit connected in series between the negative electrode of the capacitor C1 and the static bias circuit; and the serial connection The switch machine squelch circuit is formed between the power amplifier circuit and the negative pole of the capacitor C5. The input terminal of the low distortion power amplifier system of the present invention is connected...