CN212344040U

CN212344040U - PC desktop built-in sound equipment using front audio signal

Info

Publication number: CN212344040U
Application number: CN202022098475.2U
Authority: CN
Inventors: 蒋宇超
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-01-12
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses an utilize leading Audio signal's built-in stereo set of PC desktop, including the leading Audio frequency contact pin of mainboard, the Audio socket, power amplifier circuit and built-in loudspeaker, the Audio socket includes earphone Audio frequency socket and microphone Audio frequency socket, the leading Audio frequency contact pin of mainboard has 10 stitches, earphone Audio frequency socket and microphone Audio frequency socket have 5 stitches, power amplifier circuit includes power amplifier chip, coupling capacitance C1, C2, electrolytic capacitance C4, filter capacitance C3, resistance R1, R2, power amplifier chip has 15 stitches, coupling capacitance C1, C2 is connected with stitch 4 and stitch 12 of power amplifier chip respectively, built-in loudspeaker has two, the leading Audio frequency contact pin of mainboard, earphone Audio frequency socket, microphone Audio frequency socket and power amplifier circuit pass through socket J1Audio1 and J2Audio2 electric connection. The utility model has the advantages that: simple structure, good tone quality, good universality and low price.

Description

PC desktop built-in sound equipment using front audio signal

Technical Field

The utility model relates to an audio circuit technical field specifically indicates an utilize leading audio signal's built-in stereo set of PC desktop.

Background

At present, the traditional desktop computer needs to be connected with an external independent sound box or an external earphone in order to hear the sound. The external independent sound box is large in size, occupies a certain space when being placed on a desktop, and is relatively high in power consumption.

Therefore, an external USB small sound device based on a USB interface appears in the market. The sound box is small in size and does not occupy too much desktop space. However, the USB interface 5V of the computer host is adopted for power supply, the tone quality is poor, the effect of the external independent sound equipment cannot be achieved, and the effect is always unsatisfactory.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is, to above-mentioned problem, provide a simple structure, tone quality is good, the commonality is good, low price's PC desktop built-in stereo set of leading audio signal of utilization.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides an utilize leading audio signal's built-in stereo set of PC desktop, includes leading audio frequency contact pin of mainboard, audio socket, power amplifier circuit and built-in loudspeaker, the audio socket includes earphone audio frequency socket and microphone audio frequency socket, the leading audio frequency contact pin of mainboard has 10 stitches, the stitch 2 and the 4 short circuits of stitch of the leading audio frequency contact pin of mainboard, stitch 6, stitch 7 and the 10 short circuits of stitch of the leading audio frequency contact pin of mainboard, earphone audio frequency socket and microphone audio frequency socket have 5 stitches, the stitch 2 and the 5 acquiescence short circuits of earphone audio frequency socket and microphone audio frequency socket, the stitch 3 and the 4 acquiescence short circuits of earphone audio frequency socket and microphone audio frequency socket, power amplifier circuit includes the power amplifier chip, coupling capacitance C1, C2, electrolytic capacitance C4, filter capacitance C3, resistance R1, R2, the power amplifier chip has 15 stitches, coupling capacitance C1, C2 are connected with power amplifier chip's stitch 4 and stitch 12 respectively, built-in loudspeaker have two, two built-in loudspeaker are connected with power amplifier chip's stitch 1, stitch 2 and stitch 14, stitch 15 respectively, power amplifier circuit's stitch 3 and stitch 13 parallel access external power source, ground connection behind power amplifier circuit's stitch 8 and the 9 short circuit of stitch, power amplifier chip's stitch 6 and stitch 7 short circuit back, draw the power on the resistance R1 of a way, another circuit resistance R2 pulls down ground connection, resistance R2 is parallelly connected with electrolytic capacitor C4, and the parallelly connected filter capacitance C3 that has between ground connection circuit and the external power source, leading Audio frequency contact pin of mainboard, earphone Audio frequency socket, microphone Audio frequency socket and power amplifier circuit pass through socket J1Audio1 and J2Audio2 electric connection.

Compared with the prior art, the utility model the advantage lie in: the utility model discloses simple structure utilizes the leading audio signal of mainboard itself, walks the line in the inside of case, cooperates ordinary 3.5mm audio socket, and the power amplifier chip commonly used can realize built-in sound production. And the signal switching of external earphone insertion is perfectly realized, and the function of the prepositive audio interface of the existing computer host is compatible. The utility model discloses a tone quality effect is obviously superior to external little audio amplifier of 5V USB, can match beauty with independent stereo set to be applicable to all standard desktop computer mainboards, the commonality is good, and the low price saves space, and energy saving and emission reduction has fine practical application to worth.

As an improvement, the socket J2Audio2 has 8 pins, the pin 5 and the pin 9 of the motherboard front Audio pin are respectively connected with the pin 4 and the pin 1 of the socket J2Audio2, the socket J1Audio1 has 7 pins, the pin 4 and the pin 5 of the socket J1Audio1 are respectively connected with the coupling capacitors C1 and C2, and the pin 4 and the pin 1 of the socket J2Audio2 are respectively connected with the pin 6 and the pin 353 of the socket J1Audio 1.

Drawings

Fig. 1 is a circuit diagram of a motherboard front audio pin of a PC desktop computer built-in sound equipment using a front audio signal.

Fig. 2 is a circuit diagram of a receiver audio jack and a microphone audio jack of a PC desktop PC with built-in audio using a front audio signal.

Fig. 3 is a circuit diagram of the built-in sound equipment of the PC desktop using the front audio signal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Combine the attached drawing, an utilize leading audio signal's built-in stereo set of PC desktop, including leading audio frequency contact pin of mainboard, audio socket, power amplifier circuit and built-in loudspeaker, audio socket includes earphone audio frequency socket and microphone audio frequency socket, the leading audio frequency contact pin of mainboard has 10 stitches, the stitch 2 and the 4 short circuits of stitch of the leading audio frequency contact pin of mainboard, stitch 6, stitch 7 and the 10 short circuits of stitch of the leading audio frequency contact pin of mainboard, earphone audio frequency socket and microphone audio frequency socket have 5 stitches, the stitch 2 and the 5 acquiescence short circuits of earphone audio frequency socket and microphone audio frequency socket, the stitch 3 and the 4 acquiescence short circuits of earphone audio frequency socket and microphone audio frequency socket, power amplifier circuit includes the power amplifier chip, coupling capacitance C1, C2, electrolytic capacitance C4, filter capacitance C3, resistance R1, R2, the power amplifier chip has 15, coupling capacitance C1, C2 are connected with power amplifier chip's stitch 4 and stitch 12 respectively, built-in loudspeaker have two, two built-in loudspeaker are connected with power amplifier chip's stitch 1, stitch 2 and stitch 14, stitch 15 respectively, power amplifier circuit's stitch 3 and stitch 13 parallel access external power source, ground connection behind power amplifier circuit's stitch 8 and the 9 short circuit of stitch, power amplifier chip's stitch 6 and stitch 7 short circuit back, draw the power on the resistance R1 of a way, another circuit resistance R2 pulls down ground connection, resistance R2 is parallelly connected with electrolytic capacitor C4, and the parallelly connected filter capacitance C3 that has between ground connection circuit and the external power source, leading Audio frequency contact pin of mainboard, earphone Audio frequency socket, microphone Audio frequency socket and power amplifier circuit pass through socket J1Audio1 and J2Audio2 electric connection.

The socket J2Audio2 has 8 stitches, a stitch 5 and a stitch 9 of a front Audio contact pin of the mainboard are respectively connected with a stitch 4 and a stitch 1 of a socket J2Audio2, the socket J1Audio1 has 7 stitches, a stitch 4 and a stitch 5 of a socket J1Audio1 are respectively connected with coupling capacitors C1 and C2, and a stitch 4 and a stitch 1 of a socket J2Audio2 are respectively connected with a stitch 6 and a stitch 3 of a socket J1Audio 1.

The utility model discloses a theory of operation: when the built-in sound box of the PC desktop computer utilizing the front audio signal is used, the front audio signal of the mainboard is transmitted to the built-in power amplifier circuit, the 12V power supply of the computer is utilized for supplying power, and the audio signal switching of inserting and extracting the earphone is carried out through the short circuit and disconnection of the pin physical structure of the common 3.5mm audio seat, so that the alternate use of the built-in sound box and the earphone is ensured. The utility model discloses a circuit is simple, the commonality is high, low cost, tone quality effect are better.

The present invention has been described in connection with the embodiments thereof, and the description is not intended to be limiting, and the embodiments of the present invention are shown in the drawings, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides an utilize leading audio signal's built-in stereo set of PC desktop, includes leading audio frequency contact pin of mainboard, audio socket, power amplifier circuit and built-in loudspeaker, its characterized in that: the audio socket includes earphone audio socket and microphone audio socket, the leading audio frequency contact pin of mainboard has 10 stitches, the stitch 2 and the 4 short circuits of stitch of the leading audio frequency contact pin of mainboard, stitch 6, stitch 7 and the 10 short circuits of stitch of the leading audio frequency contact pin of mainboard, earphone audio socket and microphone audio socket have 5 stitches, the stitch 2 and the 5 acquiescence short circuits of stitch of earphone audio socket and microphone audio socket, the stitch 3 and the 4 acquiescence short circuits of stitch of earphone audio socket and microphone audio socket, power amplifier circuit includes power amplifier chip, coupling capacitance C1, C2, electrolytic capacitor C4, filter capacitance C3, resistance R1, R2, power amplifier chip has 15 stitches, coupling capacitance C1, C2 are connected with power amplifier chip's stitch 4 and stitch 12 respectively, built-in loudspeaker stitch has two, two built-in loudspeaker stitch respectively with 1, the power amplifier of chip, Stitch 2 and stitch 14, stitch 15 are connected, power amplifier circuit's stitch 3 and stitch 13 parallel access external power source, power amplifier circuit's stitch 8 and stitch 9 short circuit back ground connection, power amplifier chip's stitch 6 and stitch 7 short circuit back, draw the power on the resistance R1 of a way, another circuit resistance R2 pulls down ground connection, resistance R2 is parallelly connected with electrolytic capacitor C4, and it has filter capacitor C3 to connect in parallel between ground circuit and the external power source line, leading Audio frequency contact pin of mainboard, earphone Audio frequency socket, microphone Audio frequency socket and power amplifier circuit pass through socket J1Audio1 and J2Audio2 electric connection.

2. The PC desktop built-in sound with front audio signal of claim 1, wherein: the socket J2Audio2 is provided with 8 pins, a pin 5 and a pin 9 of a front Audio contact pin of the mainboard are respectively connected with a pin 4 and a pin 1 of the socket J2Audio2, the socket J1Audio1 is provided with 7 pins, the pin 4 and the pin 5 of the socket J1Audio1 are respectively connected with coupling capacitors C1 and C2, and the pin 4 and the pin 1 of the socket J2Audio2 are respectively connected with a pin 6 and a pin 3 of the socket J1Audio 1.