Low-distortion power amplifier system based on switch-on/switch-off squelch circuit

A squelch circuit and power amplifier system technology, applied in the direction of low-frequency amplifiers, power amplifiers, transducer circuits, etc., can solve problems such as signal distortion and signal distortion, and achieve the effects of improving quality, eliminating impact, and avoiding signal distortion

CN105978507AInactive Publication Date: 2016-09-28成都特普瑞斯节能环保科技有限公司
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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

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Abstract

The invention discloses a low-distortion power amplifier system based on a switch-on / switch-off squelch circuit. The system mainly comprises a static biasing circuit, a power amplifier circuit connected with the static biasing circuit, a capacitor C1 of which cathode is connected with the static biasing circuit and anode is taken as the input end of the power amplifier system, and so on. According to the system, muting can be automatically performed just when power is switched on, the impact of heavy current on a loudspeaker can be eliminated when the power is just switched on, and therefore, the loudspeaker can be protected.
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Description

Technical field

[0001] The invention relates to a power amplifier system, in particular to a low-distortion power amplifier system based on a switch mute 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, the existing power amplifier system has a major problem, that is, the amplified signal is prone to different degrees of distortion, resulting in signal distortion, which seriously affects the auditory effect. Summary of the invention

[0003] The purpose of the present invention is to overcome the defect that the current power amplifier system may easily distort the signal after amplifying the signal and cause signal distortion, and provide a low-distortion power amplifier system based on the switch mute circuit.

[0004] The purpose of the present invention is achieved with the following technical sol...

Examples

Embodiment

[0015] Such as figure 1 As shown, the present invention mainly consists of a static bias circuit, a power amplifier circuit connected to the static bias circuit, a capacitor C1 whose negative pole is connected to the static bias circuit, and the positive pole is used as the input end of the power amplifier system, and one end is connected to the negative pole of the capacitor C1. The resistor R1 connected with the other end grounded, the negative pole is grounded, the positive pole is connected to the power amplifier circuit through the resistor R10, and the capacitor C5 is connected to the power amplifier circuit, and the power amplifier circuit and the negative pole of the capacitor C5 are connected in series. The input end of the low-distortion power amplifier system of the present invention is connected to an external signal source.

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