CN2664333Y

CN2664333Y - Loudspeaker audio-frequency output two-order three-frequency dividing coupling circuit

Info

Publication number: CN2664333Y
Application number: CN 200320103165
Authority: CN
Inventors: 贺东
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-10
Filing date: 2003-11-10
Publication date: 2004-12-15
Anticipated expiration: 2013-11-10

Abstract

The utility model discloses a loudspeaker audio-frequency output two-order three-frequency dividing coupling circuit consisting of a bass loudspeaker, a mediant loudspeaker, an alt loudspeaker and a two-order three-frequency dividing coupling circuit. A positive input end of the two-order three-frequency dividing coupling circuit inputs an audio signal and then divides into three circuits: one circuit is connected with an anode of the bass loudspeaker through an inductance (L1); one circuit is connected with an anode of the mediant loudspeaker through a capacitance (C2) and an inductance (L2); a joint between the capacitance (C2) and the inductance (L2) is connected with the other end of the inductance (L2) with one end grounded; one circuit is connected with an anode of the alt loudspeaker through a capacitance (C3); a joint between the capacitance (C3) and the anode of the alt loudspeaker is connected with the other end of an inductance (L4) with one end grounded; a capacitance (C1) is connected in series with the alt loudspeaker and the bass loudspeaker. The utility model is characterized in simple circuit structure, good transient response, thorough frequency demultiplication and good tone effect.

Description

Loudspeaker audio output second order three frequency division coupling circuit

Technical field

The utility model relates to the audio output circuit of a kind of sound equipment with loud speaker, especially a kind of loudspeaker audio output second order three frequency division coupling circuit.

Technical background

The audio output circuit of the loud speaker that sound equipment adopted in the market is general main to be made up of inductance coil (being generally air core inductor), polarity free capacitor (being generally polypropylene capactive) and resistance, because having, inductance hinders the characteristic that high-frequency current passes through, the characteristic that electric capacity then has the obstruction low-frequency current to pass through, so shunting respectively by inductance and electric capacity, high-frequency signal in the audio signal and low frequency signal can be separated, thereby finish frequency division work.But the audio output circuit that present many manufacturers adopted is directly to be connected in series an electric capacity on high pitch or middle pitch unit, and directly inductance of serial connection carries out frequency division on bass unit.Owing to do not have inductance coil (or electric capacity) in this circuit, come out so can only accomplish a high pitch (or bass) Signal Separation, and input bass (or high pitch) unit remain primary signal without frequency division, its tonequality of nature shows unsatisfactory.

The utility model content

The purpose of this utility model is: at the deficiencies in the prior art, provide that a kind of circuit structure is simple, instant response good, the Frequency Response curve is smooth, frequency division is thorough, thereby can obtain the loudspeaker audio output second order three frequency division coupling circuit of splendid acoustical quality.

In order to solve the problems of the technologies described above, technical solution adopted in the utility model is: a kind of loudspeaker audio output second order three frequency division coupling circuit, comprise woofer L-OUT, Squawker M-OUT and high pitch loudspeaker H-OUT, also comprise second order three frequency division coupling circuit, described second order three frequency division coupling circuit is made of some inductance and electric capacity, its positive input input audio signal, its negative input ground connection; Described audio signal is divided into three the tunnel, and the inductance L 1 of leading up to connects the positive pole of woofer L-OUT; The capacitor C 2, inductance L 2 of leading up to connects the positive pole of Squawker M-OUT, and the interface of capacitor C 2 and inductance L 2 is connected with the other end of the inductance L 2 of an end ground connection; Third Road connects the positive pole of high pitch loudspeaker H-OUT by capacitor C 3, and the interface between the positive pole of capacitor C 3 and high pitch loudspeaker H-OUT is connected with the other end of the inductance L 4 of an end ground connection; Be in series with capacitor C 1 between the positive pole of described high pitch loudspeaker H-OUT and woofer L-OUT.

The equal ground connection of negative pole of described high pitch loudspeaker H-OUT, woofer L-OUT and Squawker M-OUT.

Owing to take technique scheme, the beneficial effect that the utility model had is: because the inductance of ground connection all is provided at middle pitch, voice unit in the loudspeaker audio that the is provided output second order three frequency division coupling circuit, simultaneously between bass and voice unit, electric capacity is set, thereby plays coupling.Therefore not only frequency division is thorough, can produce milder slope and good transient response, and its circuit structure is simple, with low cost, can minimum input obtain optimum acoustical quality.

Description of drawings

Accompanying drawing 1 is the circuit theory diagrams of the utility model loudspeaker audio output second order three frequency division coupling circuit.

Embodiment

Below with reference to Figure of description and specific embodiment the utility model loudspeaker audio output second order three frequency division coupling circuit is described in further detail.

With reference to the accompanying drawings, the utility model loudspeaker audio output second order three frequency division coupling circuit is made of woofer L-OUT, Squawker M-OUT, high pitch loudspeaker H-OUT and second order three frequency division coupling circuit.

Described second order three frequency division coupling circuit is made of some inductance and electric capacity, its positive input input audio signal, its negative input ground connection; Described audio signal is divided into three the tunnel, and the inductance L 1 of leading up to connects the positive pole of woofer L-OUT; The capacitor C 2, inductance L 2 of leading up to connects the positive pole of Squawker M-OUT, and the interface of capacitor C 2 and inductance L 2 is connected with the other end of the inductance L 2 of an end ground connection; Third Road connects the positive pole of high pitch loudspeaker H-OUT by capacitor C 3, and the interface between the positive pole of capacitor C 3 and high pitch loudspeaker H-OUT is connected with the other end of the inductance L 4 of an end ground connection; Be in series with capacitor C 1 between the positive pole of described high pitch loudspeaker H-OUT and woofer L-OUT.The equal ground connection of negative pole of described high pitch loudspeaker H-OUT, woofer L-OUT and Squawker M-OUT.

Claims

1, a kind of loudspeaker audio output second order three frequency division coupling circuit, comprise woofer (L-OUT), Squawker (M-OUT) and high pitch loudspeaker (H-OUT), it is characterized in that: also comprise second order three frequency division coupling circuit, described second order three frequency division coupling circuit is made of some inductance and electric capacity, its positive input input audio signal, its negative input ground connection; Described audio signal is divided into three the tunnel, and the inductance (L1) of leading up to connects the positive pole of woofer (L-OUT); Leading up to electric capacity (C2), inductance (L2) connects the positive pole of Squawker (M-OUT), and the interface of electric capacity (C2) and inductance (L2) is connected with the other end of the inductance (L2) of an end ground connection; Third Road connects the positive pole of high pitch loudspeaker (H-OUT) by electric capacity (C3), and the interface between the positive pole of electric capacity (C3) and high pitch loudspeaker (H-OUT) is connected with the other end of the inductance (L4) of an end ground connection; Be in series with electric capacity (C1) between the positive pole of described high pitch loudspeaker (H-OUT) and woofer (L-OUT).

2, loudspeaker audio is exported second order three frequency division coupling circuit according to claim 1, it is characterized in that: the equal ground connection of negative pole of described high pitch loudspeaker (H-OUT), woofer (L-OUT) and Squawker (M-OUT).