CN203434944U - Low-power communication audio signal amplifier - Google Patents

Abstract

The utility model discloses a low-power communication audio signal amplifier which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first triode, a second triode, a third triode, a first transformer, a second transformer, a potentiometer and a loudspeaker; a weak signal is input from the primary end of the first transformer, the sensed signal is sent to the base electrode of the first triode for amplification; the collector electrode of the first triode sends the amplified signal to the second transformer, then the signal is sent to the loudspeaker through the fifth capacitor and the sixth capacitor, and the loudspeaker plays the amplified audio signal. According to the utility model, the circuit structure is simple, few electronic elements are adopted, the cost is low, and the low-power communication audio signal amplifier is low in power and power dissipation and less in energy consumption, and is especially suitable for communication products adopting storage batteries, so as to prolong the stand-by time of the products, and facilitate popularization and application.

Description

A kind of lower powered communication audio signal amplifier

Technical field

The utility model relates to a kind of communication device internal circuit, relates in particular to a kind of lower powered communication audio signal amplifier.

Background technology

Wireless telecommunications are to utilize radio wave but not cable is realized the communication of equipment room, this communication mode has quick and easy installation and maintenance, is not subject to not advantages of higher of site contour environmental impact, cost, and abundant product can meet the different demands of user on communication distance and traffic rate.And in prior art, the circuit structure for the signal amplifier of communication apparatus is complicated, cost is high, volume is large, and power is higher, consumes energy high, causes adopting the product stand-by time of battery not long, uses inconvenience, is unfavorable for popularization.

Utility model content

The purpose of this utility model provides a kind of lower powered communication audio signal amplifier with regard to being in order to address the above problem.

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

The utility model comprises the first resistance to the 13 resistance, the first electric capacity to the seven electric capacity, the first triode to the three triodes, the first transformer, the second transformer, potentiometer and loud speaker, the elementary of described the first transformer is the signal input part of described communication audio signal amplifier, the first end of described the first transformer secondary output is connected with the first end of described the second resistance and the first end of described potentiometer simultaneously, the second end while of described the first transformer secondary output and the first end of described the first resistance, the first end of described the 3rd resistance, the second end of described the second resistance, the second end of described potentiometer, the first end of described the 7th resistance is connected with the first end of described the 4th electric capacity, the second end of described the first resistance is connected with the first end of described the 4th resistance with the first end of described the first electric capacity simultaneously, the second end ground connection of described the first electric capacity, the second end while of described the 4th resistance and the first end of described the second electric capacity, the first end of described the 5th resistance, the first end of described the second primary, the first end of described the 8th resistance is connected with the collector electrode of described the second triode, the equal ground connection of the second end of the second end of described the second electric capacity and described the 5th resistance, the second end while of described the 3rd resistance and the first end of described the 6th resistance, the first end of described the 3rd electric capacity, the first end of described the 11 resistance, the first end of described the 13 resistance, described the 7th first end of electric capacity and the first end of described loud speaker are connected, the sliding end of described potentiometer is connected with the base stage of described the first triode, the emitter of described the first triode is connected with the second end of described the 3rd electric capacity with the second end of described the 6th resistance simultaneously, the collector electrode of described the first triode is connected with the second end of described the second primary, the first end of described second transformer secondary output the first coil is connected with the base stage of described the second triode, the second end of described second transformer secondary output the first coil is connected with the first end of described the 9th resistance with the second end of described the 8th resistance, the first end of described second transformer secondary output the second coil is connected with the first end of described the tenth resistance with the second end of described the 11 resistance simultaneously, the second end of described second transformer secondary output the second coil is connected with the base stage of described the 3rd triode, the second end while of described the tenth resistance and the second end of described the 9th resistance, the collector electrode of described the 3rd triode, the first end of described the 12 resistance, the first end of described the 5th electric capacity is connected with the first end of described the 6th electric capacity, the second end of described the 12 resistance is connected with the emitter of described the second triode, the emitter of described the 3rd triode is connected with the second end of described the 13 resistance, the second end while of described the 5th electric capacity and the second end of described the 6th electric capacity, the second end of described loud speaker, the second end of described the 7th electric capacity, the second end of described the 7th resistance is connected with the second end of described the 4th electric capacity.

The beneficial effects of the utility model are:

The utility model is a kind of lower powered communication audio signal amplifier, compared with prior art, circuit structure of the present utility model is simple, employing electronic component is few, with low cost, and power of the present utility model is low, low in energy consumption, power consumption is few, is particularly useful for adopting the communication product of storage battery, the stand-by time of product is extended, be conducive to promote and use.

Accompanying drawing explanation

Fig. 1 is circuit structure schematic diagram of the present utility model.

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 electric R1 to the 13 resistance R 13, the first capacitor C 1 is to the 7th capacitor C 7, the first triode VT1 to the three triode VT3, the first transformer T1, the second transformer T2, potentiometer RP and loud speaker BL, the elementary of the first transformer T1 is the signal input part IN of communication audio signal amplifier, the first end of the first transformer T1 time level is connected with the first end of potentiometer RP with the first end of the second resistance R 2 simultaneously, the second end while of the first transformer T1 time level and the first end of the first resistance R 1, the first end of the 3rd resistance R 3, the second end of the second resistance R 2, the second end of potentiometer RP, the first end of the 7th resistance R 7 is connected with the first end of the 4th capacitor C 4, the second end of the first resistance R 1 is connected with the first end of the 4th resistance R 4 with the first end of the first capacitor C 1 simultaneously, the second end ground connection of the first capacitor C 1, the second end while of the 4th resistance R 4 and the first end of the second capacitor C 2, the first end of the 5th resistance R 5, the elementary first end of the second transformer T2, the first end of the 8th resistance R 8 is connected with the collector electrode of the second triode VT2, the equal ground connection of the second end of the second end of the second capacitor C 2 and the 5th resistance R 5, the second end while of the 3rd resistance R 3 and the first end of the 6th resistance R 6, the first end of the 3rd capacitor C 3, the first end of the 11 resistance R 11, the first end of the 13 resistance R 13, the first end of the 7th capacitor C 7 is connected with the first end of loud speaker BL, the sliding end of potentiometer RP is connected with the base stage of the first triode VT1, the emitter of the first triode VT1 is connected with the second end of the 3rd capacitor C 3 with the second end of the 6th resistance R 6 simultaneously, the collector electrode of the first triode VT1 second end elementary with the second transformer T2 is connected, the first end of second transformer T2 time level the first coil is connected with the base stage of the second triode VT2, second transformer T2 time level the second end of the first coil and the second end of the 8th resistance R 8 are connected with the first end of the 9th resistance R 9, the first end of second transformer T time level the second coil is connected with the first end of the tenth resistance R 10 with the second end of the 11 resistance R 11 simultaneously, the second end of second transformer T2 time level the second coil is connected with the base stage of the 3rd triode VT3, the second end while of the tenth resistance R 10 and the second end of the 9th resistance R 9, the collector electrode of the 3rd triode VT3, the first end of the 12 resistance R 12, the first end of the 5th capacitor C 5 is connected with the first end of the 6th capacitor C 6, the second end of the 12 resistance R 12 is connected with the emitter of the second triode VT2, the emitter of the 3rd triode VT3 is connected with the second end of the 13 resistance R 13, the second end while of the 5th capacitor C 5 and the second end of the 6th capacitor C 6, the second end of loud speaker BL, the second end of the 7th capacitor C 7, the second end of the 7th resistance R 7 is connected with the second end of the 4th capacitor C 4.

As shown in Figure 1: faint signal is by the elementary input of the first transformer T1, sense that signal delivers to the base stage of the first triode VT1 and amplify, the collector electrode of the first triode is delivered to the second transformer T2 by amplifying signal, the interaction energy of the second transformer T2 is used the single-ended both-end that becomes, around referring to two groups of the second transformer T2 secondary are delivered to respectively the single-ended formula amplifying circuit of pushing off being comprised of the second triode VT2 and the 3rd triode VT3, work in class AB state, through the 5th capacitor C 5 and the 6th capacitor C 6, deliver to loud speaker BL, loud speaker BL sends the audio signal after amplification.

Claims (1)

1. a lower powered communication audio signal amplifier, it is characterized in that: comprise the first resistance to the 13 resistance, the first electric capacity to the seven electric capacity, the first triode to the three triodes, the first transformer, the second transformer, potentiometer and loud speaker, the elementary of described the first transformer is the signal input part of described communication audio signal amplifier, the first end of described the first transformer secondary output is connected with the first end of described the second resistance and the first end of described potentiometer simultaneously, the second end while of described the first transformer secondary output and the first end of described the first resistance, the first end of described the 3rd resistance, the second end of described the second resistance, the second end of described potentiometer, the first end of described the 7th resistance is connected with the first end of described the 4th electric capacity, the second end of described the first resistance is connected with the first end of described the 4th resistance with the first end of described the first electric capacity simultaneously, the second end ground connection of described the first electric capacity, the second end while of described the 4th resistance and the first end of described the second electric capacity, the first end of described the 5th resistance, the first end of described the second primary, the first end of described the 8th resistance is connected with the collector electrode of described the second triode, the equal ground connection of the second end of the second end of described the second electric capacity and described the 5th resistance, the second end while of described the 3rd resistance and the first end of described the 6th resistance, the first end of described the 3rd electric capacity, the first end of described the 11 resistance, the first end of described the 13 resistance, described the 7th first end of electric capacity and the first end of described loud speaker are connected, the sliding end of described potentiometer is connected with the base stage of described the first triode, the emitter of described the first triode is connected with the second end of described the 3rd electric capacity with the second end of described the 6th resistance simultaneously, the collector electrode of described the first triode is connected with the second end of described the second primary, the first end of described second transformer secondary output the first coil is connected with the base stage of described the second triode, the second end of described second transformer secondary output the first coil is connected with the first end of described the 9th resistance with the second end of described the 8th resistance, the first end of described second transformer secondary output the second coil is connected with the first end of described the tenth resistance with the second end of described the 11 resistance simultaneously, the second end of described second transformer secondary output the second coil is connected with the base stage of described the 3rd triode, the second end while of described the tenth resistance and the second end of described the 9th resistance, the collector electrode of described the 3rd triode, the first end of described the 12 resistance, the first end of described the 5th electric capacity is connected with the first end of described the 6th electric capacity, the second end of described the 12 resistance is connected with the emitter of described the second triode, the emitter of described the 3rd triode is connected with the second end of described the 13 resistance, the second end while of described the 5th electric capacity and the second end of described the 6th electric capacity, the second end of described loud speaker, the second end of described the 7th electric capacity, the second end of described the 7th resistance is connected with the second end of described the 4th electric capacity.

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