Mid-bass frequency division circuit of frequency divider

Abstract

The utility model relates to the technical field of frequency dividers, and discloses a mid-bass frequency division circuit of a frequency divider, comprising a frequency division unit, and a frequency division signal port connected to two ends of the frequency division unit, wherein the frequency division signal port comprises a frequency division signal input end connected to a host signal output end, and a frequency division signal output end connected to a mid-bass speaker, wherein the frequency division unit comprises an inductor L1 connected between a positive pole of the frequency division signal input end and a positive pole of the mid-bass speaker, and a capacitor C1 and a capacitor C2 connected between the positive pole of the mid-bass speaker and the inductor L1, and on the basis of a traditional second-order frequency division network circuit design, a capacitor and three switches are added, that is, the circuit comprises two capacitors with different capacitance values, and the capacitance value in the circuit has three choices (capacitor C1, capacitor C2, capacitor C1+capacitor C2), that is, there are three frequency division points in the circuit for selection, and they cooperate with each other, so as to obtain a more flexible and variable, more accurate frequency division network, and obtain more real, pleasant and pleasant music.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency dividers, in particular to a frequency divider for car audio, in particular to a mid-bass frequency divider circuit for the frequency divider. Background Art

[0002] Car audio crossovers are used to distribute the required frequencies between the various speaker units.

[0003] After searching, the patent with application number CN201220572364.3 discloses a frequency divider, which is a three-way frequency divider, including a woofer connected to a woofer, a midrange unit connected to a midrange unit, and a tweeter connected to a tweeter. The utility model adopts a three-way frequency division design, that is, the high, medium and low frequency bands are undertaken by different speaker units. Since each works in a different frequency band, the frequency division curve will not produce the phenomenon of intersecting after the frequency division points fall, and will not cause the peaks and valleys or peaks and drums in the synthesized curve. In this way, there is no phase interference in the frequency divider, making the sound restoration more accurate, the sound quality performance more comprehensive, and the application range wider.

[0004] like Figure 1 As shown, the current crossover (mid-bass) circuit has a full-frequency first-order design with only inductance and no capacitors. Inductance is used to block high frequencies and low frequencies are allowed to pass within the range allowed by the inductance value. Because it is a first-order design, the extended tail sound will be louder, and the high-frequency band is not cut cleanly enough, with some redundant high frequencies.

[0005] like Figure 2 As shown, in the input full-frequency second-order design of the current crossover (mid-bass) circuit, the mid-bass crossover network adopts a combination of the physical characteristics of inductance and capacitance. The inductor is used as the first-order to block high-frequency passing, and passes the low-frequency sound within the range allowed by the inductance value, extending part of the tail sound. The capacitor is used for the second-order design, bypassing after the inductor and before the speaker, that is, the bypass circuit between the inductor output and the speaker, and the high-frequency sound extended after the inductor is directly passed by the physical characteristics of the capacitor (blocking low frequency and passing high frequency), without reaching the mid-bass speaker end, forming a second-order crossover network of the speaker crossover.

[0006] Since the second-order crossover network has only one capacitor, it can only determine the high-frequency sound under one capacitance value to pass through the bypass circuit and not reach the mid-bass speaker. The disadvantage is that there is only one capacitance value, and the high-frequency sound value can only be determined by one crossover point. Therefore, we need to propose a mid-bass crossover circuit. Utility Model Content

[0007] The purpose of the utility model is to provide a bass crossover circuit in a crossover. On the basis of the traditional second-order crossover network circuit design, a capacitor and three switches are added, that is, the circuit contains two capacitors with different capacitance values, and there are three options for the capacitance value in the circuit (capacitor C1, capacitor C2, capacitor C1+capacitor C2), that is, there are three crossover points in the circuit for selection, and they cooperate with each other to obtain a more flexible and variable, more accurate crossover network, which can obtain more real, pleasant and pleasant music, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mid-bass frequency division circuit of a frequency divider, comprising a frequency division unit, a frequency division signal port connected to both ends of the frequency division unit, the frequency division signal port comprising a frequency divider signal input end connected to a host signal output end, and a frequency divider signal output end connected to a mid-bass speaker, the frequency division unit comprising an inductor L1 connected between a positive pole of the frequency divider signal input end and a positive pole of the mid-bass speaker, a capacitor C1 and a capacitor C2 connected between the positive pole of the mid-bass speaker and the inductor L1, the capacitance values ​​of the capacitor C1 and the capacitor C2 are different, one end of the capacitor C1 and the capacitor C2 are connected to a switch group capable of adjusting the circuit capacitance value, and one end of the switch group is connected to the negative pole of the mid-bass speaker.

[0009] Preferably, the cathode of the mid-bass speaker is connected to the cathode of the signal output end of the frequency divider.

[0010] Preferably, the switch group includes a switch S3 connected between capacitor C1 and capacitor C2, a switch S1 connected to one end of capacitor C1, and a switch S2 connected to one end of capacitor C2, and the connection terminals of switch S1 and switch S2 are connected to the negative electrode of the mid-bass speaker through the negative electrode of the divider signal output terminal.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model adds a capacitor and three switches on the basis of the traditional second-order frequency division network circuit design, that is, the circuit includes two capacitors with different capacitance values, and the capacitance value in the circuit has three options (capacitor C1, capacitor C2, capacitor C1+capacitor C2), that is, there are three frequency division points in the circuit for selection, and they cooperate with each other to obtain a more flexible and accurate frequency division network, which can obtain more real, pleasant and pleasant music. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the frequency division network designed for the first order of the existing frequency divider;

[0014] Figure 2 Schematic diagram of the crossover network designed for the second order of the existing crossover;

[0015] Figure 3 It is a schematic diagram of the bass frequency division network in the frequency divider of the utility model. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3 The utility model provides a technical solution: a mid-bass frequency division circuit of a frequency divider, comprising a frequency division unit, a frequency division signal port connected to both ends of the frequency division unit, the frequency division signal port comprising a frequency divider signal input terminal connected to a host signal output terminal, and a frequency divider signal output terminal connected to a mid-bass speaker, the frequency division unit comprising an inductor L1 connected between a positive electrode of the frequency divider signal input terminal and a positive electrode of the mid-bass speaker, a capacitor C1 and a capacitor C2 connected between the positive electrode of the mid-bass speaker and the inductor L1, the capacitor C1 and the capacitor C2 having different capacitance values, by setting two capacitors with different capacitance values ​​in the circuit, any one of the capacitors can be selected and enabled through a switch in a switch group, thereby realizing the selection of different capacitance values ​​in the circuit, and realizing two different high-frequency band sounds, thereby generating two frequency division points, which is convenient for users to select.

[0018] Based on the physical properties of inductance and capacitance, the function of the inductor on the crossover is to block high frequencies and pass low frequencies, and the function of the capacitor is to block low frequencies and pass high frequencies.

[0019] One end of the capacitor C1 and the capacitor C2 is connected to a switch group with adjustable circuit capacitance value, and the switch group is provided with three switches, which are respectively used to control the activation of the capacitor C1, the capacitor C2, or the activation of the capacitor C1 and the capacitor C2 at the same time, so as to realize the selection of three different capacitance values, that is, to generate three crossover points, and one end of the switch group is connected to the negative pole of the mid-bass speaker.

[0020] The negative pole of the mid-bass speaker is connected to the negative pole of the signal output end of the frequency divider.

[0021] The switch group includes a switch S3 connected between the capacitor C1 and the capacitor C2, a switch S1 connected to one end of the capacitor C1, and a switch S2 connected to one end of the capacitor C2. The connection terminals of the switch S1 and the switch S2 are connected to the negative electrode of the mid-bass speaker through the negative electrode of the signal output terminal of the divider.

[0022] When the switch S1 is closed, the full-frequency signal output by the host or amplifier is input from the positive electrode (WIN+) of the signal input terminal of the divider, flows through the inductor L1, flows through the capacitor C1, and reaches the positive electrode (WIN-) of the signal input terminal of the divider;

[0023] When the switch S2 is closed, the full-frequency signal output by the host or amplifier is input from the positive electrode (WIN+) of the signal input terminal of the divider, flows through the inductor L1, flows through the capacitor C2, and reaches the positive electrode (WIN-) of the signal input terminal of the divider;

[0024] When switch S3 is closed, the full-frequency signal output by the host or power amplifier is input from the positive pole (WIN+) of the signal input end of the crossover, flows through the inductor L1, and then flows through the capacitor C1 and the capacitor C2, and reaches the positive pole (WIN-) of the signal input end of the crossover when switch S1 or switch S2 is closed.

[0025] As an embodiment, the parameters of the electrical components in the present application are as follows: the inductance of the inductor L1 is 1.1mH, the working voltages of the capacitors C1 and C2 are both 100V, the capacitance of the capacitor C1 is 40uF, and the capacitance of the capacitor C2 is 150uF.

[0026] When in use, since a capacitor C2 is added on the basis of the existing capacitor C1, and the capacitance values ​​of the two capacitors are different, by controlling the closing of switch S1 or switch S2, respectively controlling the enabling of capacitor C1 or capacitor C2 (i.e., closing switch S1, enabling capacitor C1, closing switch S2, starting capacitor C2), two different high-frequency band sounds can pass through, and then two crossover points can be generated according to different choices, so that it is convenient to choose a more suitable sound when listening to music;

[0027] A switch S3 is added between capacitor C1 and capacitor C2 in the circuit. When switch S3 is closed, the capacitance value in the circuit is the sum of the capacitance values ​​of capacitor C1 and capacitor C2, that is, a third capacitance value (capacitor C1+capacitor C2) is generated. When switch S3 is closed, you can choose to close switch S1 or switch S2 again.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The mid-bass frequency division circuit of the frequency division device is characterized by: The invention comprises a frequency division unit and a frequency division signal port connected to both ends of the frequency division unit, wherein the frequency division signal port comprises a frequency division signal input end connected to a host signal output end and a frequency division signal output end connected to a mid-bass speaker, and the frequency division unit comprises an inductor L1 connected between a positive pole of the frequency division signal input end and a positive pole of the mid-bass speaker, and a capacitor C1 and a capacitor C2 connected between the positive pole of the mid-bass speaker and the inductor L1, wherein the capacitance values ​​of the capacitor C1 and the capacitor C2 are different, and one end of the capacitor C1 and the capacitor C2 are connected to a switch group capable of adjusting the circuit capacitance value, and one end of the switch group is connected to the negative pole of the mid-bass speaker.

2. The bass frequency division circuit of the frequency divider according to claim 1, characterized in that: The negative pole of the mid-bass speaker is connected to the negative pole of the signal output end of the frequency divider.

3. The bass frequency division circuit of the frequency divider according to claim 1, characterized in that: The switch group includes a switch S3 connected between the capacitor C1 and the capacitor C2, a switch S1 connected to one end of the capacitor C1, and a switch S2 connected to one end of the capacitor C2.

4. The bass frequency division circuit of the frequency divider according to claim 3, characterized in that: The connection terminals of the switch S1 and the switch S2 are connected to the negative electrode of the mid-bass speaker through the negative electrode of the signal output terminal of the frequency divider.

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