KR101829004B1 - Functional amplifier system for vehicle with feedback controller - Google Patents

Abstract

The present invention relates to a functional amplifier system for a vehicle with a feedback controller to apply more precise sound by removing noise and howling by applying a preamplifier and a feedback controller. The present invention includes a preamplifier that amplifies a signal inputted to an input part and removes a specific frequency band and compresses it to a predetermined level; a main amplifier which amplifies the signal having passed through the preamplifier to a specific level and outputting it to an output part; a power supply part for supplying noise filtered power to the preamplifier and the main amplifier; and a feedback controller for feeding back to the preamplifier when the signal outputted from the main amplifier is equal to or higher than a preset reference output level.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a functional amplifier system for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a functional amplifier system for a vehicle to which a feedback controller is applied, and more particularly to a functional amplifier system for a vehicle to which a feedback controller for outputting more accurate sound by removing noise and howling by applying a pre- will be.

Conventionally, an automobile alarm siren control device is installed in an amplifier and is formed as an integral type, and adopts an analog method of oscillating by using a plurality of transistors, so that the size of the amplifier having the alarm siren control device is increased, It was very inadequate to install them in vehicles (police cars, fire engines, ambulances).

In other words, since a separate transceiver and a radio cassette are provided in the vehicle, there is no room for installation in the vehicle when the size of the amplifier is large.

In addition, conventionally, an analog system using a transistor or the like is adopted, so that the output sound quality of the siren is not good, and the output of the siren is greatly lowered, so that the function of the alarm can not be exhibited properly.

For this purpose, Korean Utility Model Registration No. 20-0121208 discloses an alarm siren control device which is separated from the main body of the alarm amplifier so that it can be easily installed in a narrow space in the vehicle. In particular, And to improve the stability of the circuit.

However, such a conventional vehicular alarm siren control apparatus is problematic in that: 1) when a treble sound is raised in order to transmit a clear sound, noise occurs; 2) when a microphone and a siren alternate, noise occurs; and 3) Howling sound is generated when it is near the speaker, and 4) noise is generated at the input terminal.

Korean Utility Model Registration No. 20-0121208 (Registered on Apr. 15, 1998)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a functional amplifier system for a vehicle to which a feedback controller for outputting a more accurate sound by eliminating noise and howling by applying a preamplifier and a feedback controller .

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a functional amplifier system for a vehicle to which a feedback controller according to an embodiment of the present invention is applied includes a preamplifier for amplifying a signal input to an input unit, removing a specific frequency band, A main amplifier for amplifying a signal having passed through the preamplifier to a specific level and outputting the amplified signal to an output unit; A power supply unit for supplying noise filtered power to the preamplifier and the main amplifier; And a feedback controller for feeding back to the preamplifier when the signal output from the main amplifier is equal to or higher than a predetermined reference output level.

The preamplifier includes a first amplifying unit for first amplifying a signal input to the input unit; A crossover and clipping unit for separating a frequency of the first amplified signal from the first amplification unit and reducing an output gain according to the input signal; A second amplifying unit for secondarily amplifying a signal output from the crossover and clipping unit; And a limiter and a compressor unit for removing a specific frequency band of the second amplified signal by the second amplifying unit to prevent distortion and compressing a signal of a predetermined level or higher to a preset specific level or less.

The main amplifier includes a main amplifier unit amplifying the signals output from the limit and the compressor unit to a specific level and the power unit includes a noise filter for filtering noise of power supplied to the preamplifier and the main amplifier can do.

Wherein the input unit comprises: a microphone for inputting a user's voice signal; A siren generating a siren signal; And an AUX terminal for inputting the audio signal and the siren signal to the preamplifier; The output unit may include a first speaker for outputting each of a voice signal and a siren signal separated according to an output frequency in the main amplifier.

The feedback controller may separately output the audio signal and the siren signal according to the capacity or level according to the output resistance and impedance of the first speaker.

Other specific details of the invention are included in the detailed description and drawings.

The functional amplifier system for a vehicle to which the feedback controller according to an embodiment of the present invention is applied has the effect of eliminating howling due to a feedback problem and a treble by applying a feedback controller.

In addition, preamplifier that performs compression, amplification, and filtering functions is applied to the front of the main amplifier to eliminate noise at the input and output ends, thereby outputting a more accurate sound.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a block diagram illustrating a functional amplifier system for a vehicle to which a feedback controller according to an embodiment of the present invention is applied;
FIG. 2 is a detailed block diagram of a functional amplifier system for a vehicle to which the feedback controller according to the embodiment of the present invention shown in FIG. 1 is applied.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention, and the invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The term " comprises " And / or "comprising" does not exclude the presence or addition of one or more other elements in addition to the stated element. Like reference numerals refer to like elements throughout the specification and "and / or" include each and every combination of one or more of the elements mentioned. Although "first "," second "and the like are used to describe various components, it is needless to say that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it is needless to say that the first component mentioned below may be the second component within the technical spirit of the present invention.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense that is commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" may include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

With reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a block diagram illustrating a functional amplifier system for a vehicle to which a feedback controller according to an embodiment of the present invention is applied.

A functional amplifier system 100 for a vehicle to which a feedback controller according to an embodiment of the present invention is applied includes a preamplifier 110, a main amplifier 120, a power supply 130, an output unit 150, 160).

The preamplifier 110 amplifies a signal input to the input unit 160, removes a specific frequency band, and compresses the signal to a predetermined level.

The main amplifier 120 amplifies the signal having passed through the preamplifier 110 to a specific level and outputs the amplified signal to the output unit 150.

The power supply unit 130 supplies noise filtered power to the preamplifier 110 and the main amplifier 120.

The feedback controller 140 feedbacks the signal output from the main amplifier 120 to the preamplifier 110 when the signal output from the main amplifier 120 is equal to or higher than a preset reference output level.

As another example, the feedback controller 140 may automatically adjust the input signal to a preset value according to the decibel (dB) of the input signal.

More detailed functions of the preamplifier 110, the main amplifier 120, the power supply 130, the output unit 150, and the input unit 160 will be described with reference to FIG.

FIG. 2 is a detailed block diagram of a functional amplifier system for a vehicle to which the feedback controller according to the embodiment of the present invention shown in FIG. 1 is applied.

As shown in the figure, in a functional amplifier system for a vehicle to which a feedback controller according to an embodiment of the present invention is applied, the preamplifier 110 includes a first amplifier 111, a crossover and a clipping unit 112, A limit section 113, a limit and a compressor section 114.

The first amplification unit 111 amplifies the signal input to the input unit 160 first.

The crossover and clipping unit 112 separates the frequency of the first amplified signal from the first amplification unit 111 and reduces the output gain according to the input signal.

At this time, the clipping function exceeds the limit input or the limit output that the equipment allows, and the sound is not smooth in the real sound, and it sounds like a very squeaky and dirty sound.

Clipping occurs when the digital headroom is insufficient, and the final output gain level should be set so that it does not exceed 0dB. If clipping occurs in a digital sound source, damaging clipping is not restored even if the gain is reduced in the analog device. Therefore, when mastering a digital sound source, normalization and limiter should be used to solve it.

Therefore, the present invention can solve this problem by adding a limit and a compressor unit 114, which will be described later.

The second amplifying unit 113 second amplifies the signal output from the crossover and clipping unit 112.

The limit and compressor unit 114 removes a specific frequency band of the second amplified signal from the second amplification unit 113 to prevent distortion and compresses a signal of a predetermined level or higher to a predetermined level or less.

The limit and compressor section 114 may have a structure in which a normal limit and a compressor are connected in series. Here, the compressor compresses the sound of a certain level or higher according to the compression level to make the signal smaller, then increases the output level to increase the size of the compressed signal, and increases the level of the compressed signal as well, .

The main amplifier 120 includes a main amplifier 121.

The main amplifying unit 121 amplifies the signal output from the limit and compressor unit 114 to a specific level.

The power supply unit 130 includes a noise filter 131.

The noise filter 131 filters the noise of the power supplied to the preamplifier 110 and the main amplifier 120.

The input unit 160 includes an external input 161, a microphone 162, a CD 163, a USB 164, a siren 165, and an AUX terminal 166.

The microphone 162 inputs a user's voice signal, and the siren 165 generates a siren signal.

The AUX terminal 166 physically connects the input unit 160 and the amplifier 100 and inputs the audio signal and the siren signal to the preamplifier 110.

The output unit 150 includes a first speaker 151 for outputting each of a voice signal and a siren signal separated according to an output frequency from the main amplifier 120.

Here, the feedback controller 140 separates the audio signal and the siren signal according to the capacity or level according to the output resistance and impedance of the first speaker 151, respectively.

Thus, by separately outputting each of the audio signal and the siren signal by the first speaker 151 as described above, it is possible to eliminate the noise when the microphone and the siren sound alternately, and when the microphone goes near the speaker The resulting howling sound can also be removed.

In one embodiment of the present invention, one speaker is used in a monaural manner. However, in another embodiment, the speaker further includes a plurality of second speakers (not shown), separating the audio signal and the siren signal into a stereo signal, May be modified in various ways in accordance with the gist of the present invention.

Therefore, the functional amplifier system for a vehicle to which the feedback controller according to the embodiment of the present invention is applied can remove the noise due to the howling problem and the treble by applying a feedback controller, and also performs compression, amplification and filtering functions in front of the main amplifier By applying the preamplifier to be performed, it is possible to remove the noise of the input / output stage and output a more accurate sound.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: Amplifier system 110: Preamplifier
111: first amplification unit 112: crossover and clipping unit
113: Second Amplification Unit 114: Limit and Compressor Unit
120: main amplifier 121: main amplifier section
130: Power supply unit 131: Noise filter
140: feedback controller 150: output section
151: speaker 1 160: input unit
161: External input 162: Microphone
163: CD 164: USB
165: Siren 166: AUX terminal

Claims (5)

A microphone for inputting a voice signal of a user, a siren for generating a siren signal, an input section for forming an AUX terminal roll for inputting the voice signal and the siren signal into a preamplifier, Preamplifier that removes and compresses to a certain level;
And a first speaker for outputting each of a sound signal and a siren signal separated in accordance with an output frequency from the main amplifier so as to amplify a signal having passed through the preamplifier to a specific level, Amplifier;
A power supply unit for supplying noise filtered power to the preamplifier and the main amplifier; And
And a feedback controller for feeding back to the preamplifier when the signal output from the main amplifier is equal to or higher than a preset reference output level
Functional amplifier system for vehicles with feedback controller. The method according to claim 1,
The pre-
A first amplifying unit for first amplifying a signal input to the input unit;
A crossover and clipping unit for separating a frequency of the first amplified signal from the first amplification unit and reducing an output gain according to the input signal;
A second amplifying unit for secondarily amplifying a signal output from the crossover and clipping unit;
And a limiter and a compressor unit for eliminating a specific frequency band of the second amplified signal by the second amplifying unit to prevent distortion and compressing a signal of a predetermined level or higher to a predetermined level or lower
Functional amplifier system for vehicles with feedback controller. The method according to claim 1,
In the main amplifier,
And a main amplifier for amplifying the signal output from the limit and the compressor to a specific level,
Wherein the power supply unit includes a feedback controller including a preamplifier and a noise filter for filtering noise of a power supply supplied to the main amplifier.
delete The method according to claim 1,
The feedback controller
And a feedback controller for separating and outputting the audio signal and the siren signal according to the capacity or level according to the output resistance and impedance of the first speaker.

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