CN219436972U

CN219436972U - Improved frequency dividing circuit

Info

Publication number: CN219436972U
Application number: CN202320259509.2U
Authority: CN
Inventors: 黎健宽
Original assignee: Foshan Hongyinxing Sound Co ltd
Current assignee: Foshan Hongyinxing Sound Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-28
Anticipated expiration: 2033-02-20

Abstract

An improved frequency dividing circuit relates to the technical field of frequency division, and comprises a transformer T with an audio frequency band range of F1 and a capacitor C with an audio frequency band range of F2, wherein a primary coil of the transformer T is connected with an original audio input signal F after being connected with the capacitor C in series, a secondary coil of the transformer T outputs a high-frequency audio signal with the audio frequency range of F1, and the capacitor C outputs a low-frequency audio signal with the audio frequency range of F2. Compared with the prior art, the utility model has the advantages of balancing the relation between the impedance and the inductance so as to ensure that the frequency division frequency band is large enough.

Description

Improved frequency dividing circuit

Technical Field

The utility model relates to the technical field of frequency division, in particular to an improved frequency division circuit.

Background

The existing signal divider is basically implemented by using a mode of a filtering circuit, and the filtering has a fatal weakness that a plurality of signals respectively filtered by a plurality of channels cannot be equal to the waveform of an original signal when the signals are combined. Compared with the original signal, the method has larger distortion, and indexes such as integral amplitude, waveform, amplitude of each frequency band and the like are different from the original signal. The reason is that the attenuation degree of the signal can be changed along with the frequency instability in the filtering process of the signal, and the recorded signals obtained after the filtering respectively cannot be perfectly spliced with the unoccupied signal. The existing frequency divider capable of reducing original audio signals, such as patent application technologies of patent application numbers 202210690588.2, 202210575740.2, 202222616251.5 and 202221270810.5, can solve the above problem, but the distinction between high frequency and low frequency is not obvious enough due to the fact that low frequency signals are led out at two ends of the resistor. After the high-frequency signal is separated by the transformer, the rest is separated in the form of low-frequency signal, and the bass led out by the subtracter is the voltage division between the resistance and the resistance of the primary inductance of the transformer. The voltage division ratio is limited by the resistance of the inductor, and it is difficult to make the voltage division ratio too large.

Disclosure of Invention

It is an object of the present utility model to provide an improved frequency divider circuit which overcomes one or more of the above-mentioned disadvantages, which is capable of restoring the original signal while enlarging the division ratio, and which is capable of selecting the divided high frequency and low frequency signals as desired.

The improved frequency divider circuit of the present utility model is implemented as follows:

the high-frequency power supply comprises a transformer T with a frequency range of F1 and a capacitor C with a frequency range of F2, wherein a primary coil of the transformer T is connected with the capacitor C in series and then connected with an original input signal F, a secondary coil of the transformer T outputs a high-frequency signal with the frequency range of F1, and the capacitor C outputs a low-frequency signal with the frequency range of F2.

The technical principle is as follows: the principle that the capacitance or the inductance has different impedances under different frequencies is utilized to realize the partial pressure of different frequencies, the relation between the impedance of the inductance and the frequency is XL=2pi FL, the relation Xc=1/(2pi FC) of the impedance of the capacitance is the frequency of signals input to the inductance L and the capacitance C, the impedance of the resistance of the inductance L and the capacitance C changes in opposite directions along with the change of the frequency, the impedance of the inductance L increases along with the increase of the frequency, the impedance of the capacitance C becomes smaller, therefore, a frequency dividing unit is formed by connecting a primary coil of a transformer T and the capacitance C in series, alternating current signals with the frequency are added at two ends of the unit, different partial pressures can occur at two ends of two elements in the frequency dividing unit under different frequencies, for example, in the sequential combination according to L-C, if the current is i, the partial pressure at the two ends of the inductance L is V1=2pi FL i, the voltage at the two ends of the capacitance C is V2=v1=v1=2, and the partial pressure signal at the two ends of the capacitance C is larger when the partial pressure signal is lower than the capacitance at the two ends of the capacitance C, and the partial pressure signal is larger when the partial pressure signal is lower than the partial pressure at the two ends of the capacitance is lower than the frequency; the impedance of the inductor L is large, the voltage division at two ends of the inductor L is large, more high-frequency signals can be obtained at two ends of the inductor L, the transformer T is adopted, the primary coil of the transformer T is adopted as the inductor, so that high-frequency output signals are obtained from the secondary coil of the transformer T, the voltage of the capacitor C to the ground is equal to the voltage drop of the capacitor C, and the voltage difference at two ends of the capacitor C can be directly led out, so that low-frequency output is obtained.

Because the frequency division circuit combined by using the signal filter is not needed, the situation that the high-pass signal and the low-pass signal obtained by filtering cannot be combined into an accurate original signal any more does not occur, and the signal in the required frequency range can be combined into a high-quality signal (such as sound) according to the requirement through the selection of the primary coil of the transformer T and the capacitor C.

Compared with the prior art, the utility model has the advantages of reducing signals and selecting the high-frequency and low-frequency signals after frequency division according to requirements.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic structural diagram of the present utility model when the present utility model is matched with a power amplifier.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings and examples:

an improved frequency dividing circuit: as shown in fig. 1, the audio frequency band range F1 comprises a transformer T and a capacitor C, wherein a primary coil of the transformer T is connected with the capacitor C in series and then connected with an original audio input signal F, a secondary coil of the transformer T outputs a high-frequency audio signal with the audio frequency range F1, and the capacitor C outputs a low-frequency audio signal with the audio frequency range F2.

Preferably, as shown in fig. 2, the high-frequency audio signal is connected to the class-a power amplifier D1, and the low-frequency audio signal is connected to the class-D power amplifier D2. The middle and high tones are easy to influence the hearing, and are supported by extremely low distortion, so that only a class A power amplifier can be used at present, the bass needs high power, the influence on the tone quality is small, and the quality of the tone quality is difficult to distinguish by human ears. The high-frequency audio signal is connected with the class A power amplifier D1, so that the occurrence of middle and high tone distortion can be effectively avoided, the low-frequency audio signal is connected with the class D power amplifier D2, the cost is low, and the occurrence of sound distortion which is easy to distinguish by a listener does not exist.

Claims

1. The improved frequency dividing circuit is characterized by comprising a transformer T with a frequency range of F1 and a capacitor C with a frequency range of F2, wherein a primary coil of the transformer T is connected with the capacitor C in series and then is connected with an original input signal F, a secondary coil of the transformer T outputs a signal with a frequency range of F1, and the capacitor C outputs a signal with a frequency range of F2.

2. The improved crossover circuit of claim 1 wherein the high frequency signal is a high frequency audio signal and is coupled to a class a power amplifier and the low frequency signal is a low frequency audio signal and is coupled to a class D power amplifier.