CN203522658U

CN203522658U - Novel, simple power amplifier circuit

Info

Publication number: CN203522658U
Application number: CN201320713369.8U
Authority: CN
Inventors: 陈聪明; 李红斌; 杨波
Original assignee: CHENGDU CHUAN LIAN SHENG SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: CHENGDU CHUAN LIAN SHENG SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2013-11-12
Filing date: 2013-11-12
Publication date: 2014-04-02
Anticipated expiration: 2023-11-12

Abstract

The utility model discloses a novel, simple power amplifier circuit which comprises a first potentiometer, a second potentiometer, a third potentiometer, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, a second triode, a third triode and a direct current supply. The power amplifier circuit is relatively simple in structure and relatively low in production cost, produces less heat during the working process, is small in degree of distortion, is particularly suitable for power amplification of various voice frequency signals, and therefore has relatively high popularization and promotion value.

Description

Novel simple type power amplification circuit

Technical field

The utility model relates to a kind of amplifying circuit, relates in particular to a kind of Novel simple type power amplification circuit.

Background technology

Along with economic development and scientific and technological progress, on market, there are various power amplifiers now, also along with social development is more and more perfect, the new varieties of power amplifier emerge in an endless stream, and DC power amplifier has changed their weak point, present DC power amplifier, improved tonequality, not only when professional place or amusement and recreation, people like the power amplifier that tonequality is good, therefore power amplifier is at public, families etc. are all widely used, DC power amplifier now also exists some shortcomings, as circuit structure more complicated, cost of manufacture is higher, caloric value is more high, can not meet our larger demand.

Utility model content

The purpose of this utility model provides a kind of Novel simple type power amplification circuit with regard to being in order to address the above problem.

The utility model is achieved through the following technical solutions above-mentioned purpose:

As shown in Figure 1, the utility model comprises the first potentiometer, the second potentiometer, the 3rd potentiometer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, the 3rd triode and DC power supply, the first end of described the first potentiometer is connected with the first end of signal input part, the second end while of described the first potentiometer and the second end of described signal input part, the first end of described the first resistance, the first end of described the second resistance, the negative pole of described the 4th electric capacity, the collector electrode of described the second triode is connected with the first end of signal output part and ground connection, and the sliding end of described the first potentiometer is connected with the negative pole of described the first electric capacity, the anodal while of described the first electric capacity and the second end of described the first resistance, the base stage of described the first triode, the first end of described the second potentiometer is connected with the first end of described the 3rd electric capacity, the second end while of described the second potentiometer and the negative pole of described the second electric capacity, the sliding end of described the second potentiometer, the emitter of described the 3rd triode, the emitter of described the second triode is connected with the positive pole of described the 5th electric capacity, and the negative pole of described the 5th electric capacity is connected with the second end of described signal output part, the second end while of described the 3rd electric capacity and the first end of described the 3rd potentiometer, the collector electrode of described the first triode is connected with the base stage of described the second triode, the emitter of described the first triode is connected with the positive pole of described the 4th electric capacity with the second end of described the second resistance simultaneously, the second end while of described the 3rd potentiometer and the sliding end of described the 3rd potentiometer, the first end of described the 3rd resistance is connected with the base stage of described the 3rd triode, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance with the positive pole of described the second electric capacity simultaneously, the second end while of described the 4th resistance and the collector electrode of described the 3rd triode, described the 6th positive pole of electric capacity and the positive pole of described DC power supply are connected, and described the 6th negative pole of electric capacity and the negative pole of described DC power supply are connected and ground connection.

Particularly, described the first electric capacity, described the second electric capacity, described the 3rd electric capacity, described the 5th electric capacity and described the 6th electric capacity are polar capacitor, described the first triode and described the 3rd triode are NPN type, and described the second triode is positive-negative-positive, and described DC power supply is 6V power supply.

The beneficial effects of the utility model are:

Circuit structure of the present utility model is fairly simple, and cost of manufacture is lower, in its course of work, can not produce too many heat, and the distortion factor is little, is comparatively applicable to the power amplification of various audio signals, has the value of higher penetration and promotion.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the utility model Novel simple type power amplification circuit.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, the utility model comprises the first potentiometer W1, the second potentiometer W2, the 3rd potentiometer W3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first triode Q1, the second triode Q2, the 3rd triode Q3 and DC power supply DC, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 5th capacitor C 5 and the 6th capacitor C 6 are polar capacitor, the first triode Q1 and the 3rd triode Q3 are NPN type, the second triode Q2 is positive-negative-positive, DC power supply DC is 6V power supply, the first end of the first potentiometer W1 is connected with the first end of signal input part VIN, the second end while of the first potentiometer W1 and the second end of signal input part VIN, the first end of the first resistance R 1, the first end of the second resistance R 2, the negative pole of the 4th capacitor C 4, the first end of the collector electrode of the second triode Q2 and signal output part VOUT is connected and ground connection, and the sliding end of the first potentiometer W1 is connected with the negative pole of the first capacitor C 1, the anodal while of the first capacitor C 1 and the second end of the first resistance R 1, the base stage of the first triode Q1, the first end of the second potentiometer W2 is connected with the first end of the 3rd capacitor C 3, the second end while of the second potentiometer W2 and the negative pole of the second capacitor C 2, the sliding end of the second potentiometer W2, the emitter of the 3rd triode Q3, the emitter of the second triode Q2 is connected with the positive pole of the 5th capacitor C 5, and the negative pole of the 5th capacitor C 5 is connected with the second end of signal output part VOUT, the second end while of the 3rd capacitor C 3 and the first end of the 3rd potentiometer W3, the collector electrode of the first triode Q1 is connected with the base stage of the second triode Q2, and the emitter of the first triode Q1 is connected with the positive pole of the 4th capacitor C 4 with the second end of the second resistance R 2 simultaneously, the second end while of the 3rd potentiometer W3 and the sliding end of the 3rd potentiometer W3, the first end of the 3rd resistance R 3 is connected with the base stage of the 3rd triode Q3, and the second end of the 3rd resistance R 3 is connected with the first end of the 4th resistance R 4 with the positive pole of the second capacitor C 2 simultaneously, the second end while of the 4th resistance R 4 and the collector electrode of the 3rd triode Q3, the positive pole of the 6th capacitor C 6 is connected with the positive pole of DC power supply DC, and the negative pole of the 6th capacitor C 6 is connected with the negative pole of DC power supply DC and ground connection.

The utility model is a kind of Novel simple type power amplification circuit, wherein the first triode Q1 is excitation amplifier tube, it gives power amplification output stage with enough driving signals, the first resistance R 1 and the second potentiometer W2 are the biasing resistors of the first amplifier Q1, the 3rd resistance R 3 and the 3rd potentiometer W3 are connected on the first triode Q1 collector circuit, for the 3rd triode Q3 provides biasing, while making it static in lightly conducting state, to eliminate intermodulation distortion, the 3rd capacitor C 3 is weakening electric capacity, be used for eliminating the issuable self-excitation of circuit, the second triode Q2 and the 3rd triode Q3 are mutual symmetry push-pull power amplifier pipes, form power amplification output stage, the 4th resistance R 4 is used as current-limiting resistance in circuit, circuit structure of the present utility model is fairly simple, cost of manufacture is lower, in its course of work, can not produce too many heat, and the distortion factor is little, comparatively be applicable to the power amplification of various audio signals, the value with higher penetration and promotion.

Claims

1. a Novel simple type power amplification circuit, is characterized in that: comprise the first potentiometer, the second potentiometer, the 3rd potentiometer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, the 3rd triode and DC power supply, the first end of described the first potentiometer is connected with the first end of signal input part, the second end while of described the first potentiometer and the second end of described signal input part, the first end of described the first resistance, the first end of described the second resistance, the negative pole of described the 4th electric capacity, the collector electrode of described the second triode is connected with the first end of signal output part and ground connection, and the sliding end of described the first potentiometer is connected with the negative pole of described the first electric capacity, the anodal while of described the first electric capacity and the second end of described the first resistance, the base stage of described the first triode, the first end of described the second potentiometer is connected with the first end of described the 3rd electric capacity, the second end while of described the second potentiometer and the negative pole of described the second electric capacity, the sliding end of described the second potentiometer, the emitter of described the 3rd triode, the emitter of described the second triode is connected with the positive pole of described the 5th electric capacity, and the negative pole of described the 5th electric capacity is connected with the second end of described signal output part, the second end while of described the 3rd electric capacity and the first end of described the 3rd potentiometer, the collector electrode of described the first triode is connected with the base stage of described the second triode, the emitter of described the first triode is connected with the positive pole of described the 4th electric capacity with the second end of described the second resistance simultaneously, the second end while of described the 3rd potentiometer and the sliding end of described the 3rd potentiometer, the first end of described the 3rd resistance is connected with the base stage of described the 3rd triode, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance with the positive pole of described the second electric capacity simultaneously, the second end while of described the 4th resistance and the collector electrode of described the 3rd triode, described the 6th positive pole of electric capacity and the positive pole of described DC power supply are connected, and described the 6th negative pole of electric capacity and the negative pole of described DC power supply are connected and ground connection.

2. Novel simple type power amplification circuit according to claim 1, it is characterized in that: described the first electric capacity, described the second electric capacity, described the 3rd electric capacity, described the 5th electric capacity and described the 6th electric capacity are polar capacitor, described the first triode and described the 3rd triode are NPN type, described the second triode is positive-negative-positive, and described DC power supply is 6V power supply.