CN2246357Y

CN2246357Y - Bell ringing device of externally-connected telephone

Info

Publication number: CN2246357Y
Application number: CN 95221432
Authority: CN
Inventors: 刘文彬; 林永斌
Original assignee: XIAMEN XINGLIAN ELECTRONICS CO Ltd
Current assignee: XIAMEN XINGLIAN ELECTRONICS CO Ltd
Priority date: 1995-09-06
Filing date: 1995-09-06
Publication date: 1997-01-29
Anticipated expiration: 2005-09-06

Abstract

The utility model relates to a subscriber calling device for telephone communication, which is composed of a rectifying circuit, an AC/DC conversion DC power circuit and a sounding circuit, wherein, the input end of the rectifying circuit is connected with the subscriber input end of a telephone circuit, and the output end of the rectifying circuit is connected with an input port of the telephone circuit; the AC/DC conversion DC power circuit comprises a DC isolating circuit, a power rectifying circuit and a filtering circuit; the input end of the DC isolating circuit is connected with the subscriber input end of the telephone circuit, the output end of the DC isolating circuit is connected with the power rectifying circuit, and the output of the power rectifying circuit is connected with the sounding circuit after filtering. The utility model adopts an external connection structure, the structure of the original telephone does not need to be changed, and the utility model can not only provide needed euphonic ring but also can make the original telephone send no ring.

Description

Circumscribed ringing device

The utility model relates to a kind of telephone communication calling party's device.

The ringing circuit of existing telephone set is made up of the ring application-specific integrated circuit (ASIC) usually, and the sound that is sent is dullness, ear-piercing comparatively, especially in the dead of night or phone more obvious when frequent.

A kind of ringing telephone stations gradually ringing device of CN2178967Y patent disclosure, in former ringing circuit, add the equivalent variable impedor, its impedance changes in time automatically, be used for bell signal shunting or dividing potential drop, or be used to control the bell signal Amplifier Gain, can realize the ascending crescendo of phone ringing volume prolongation in time.The CN2120412U patent application discloses a kind of telephone set of automatic adjusting bell sound, if talking and receiving circuit, dialing signal generation circuit and bell sound call circuit pass through to connect delay trigger circuit to realize that ring tone is by weak extremely strong self-regulating function in the bell sound call circuit load circuit.

Usually, the telephone set internal wiring can not arbitrarily be changed, but many users wish that the tinkle of bells is soft melodious musical sound, " ding-dong " sound or " dripping " sound.

The purpose of this utility model aims to provide a kind of circumscribed ringing device, it does not need the original call machine is done any change, can when inserting, send by phone required melodious the tinkle of bells (musical sound or " ding-dong " sound or " dripping " sound), and original telephone set does not send the tinkle of bells, and does not influence normal conversation and telephone network circuit.

The utility model comprises rectification circuit, phone ringing-current (AC signal) is converted to the AC-DC conversion DC power supply circuit and the acoustics circuit of DC power supply.The answer the call user input of circuit of the input of rectification circuit, the user input mouth of the telephone set telephone line that the output termination of rectification circuit is used.The AC-DC conversion DC power supply circuit comprises block isolating circuit, power rectifier circuit and filter circuit, the answer the call user input of circuit of the input of block isolating circuit, the AC signal output termination power rectifier circuit input of block isolating circuit, the rectified signal output termination filter circuit of power rectifier circuit, the filtering signal output termination acoustics circuit of filter circuit.Block isolating circuit adopts capacitance.

Rectification circuit can adopt diode bridge rectifier circuit or half-wave rectifying circuit, preferably adopts diode bridge rectifier circuit.Power rectifier circuit in the AC-DC conversion DC power supply circuit can adopt diode bridge rectifier circuit or half-wave rectifying circuit, preferably adopts diode bridge rectifier circuit.

The input of capacitance or output can connect current-limiting resistance.

Acoustics circuit can adopt existing music integrated audio circuit or " ding-dong " sound to ring circuit or " dripping " sound sound circuit, or the combination of these acoustics circuits.

The utility model adopts the circumscribed structure, need not change original telephone set, required melodious the tinkle of bells can be provided, and make original telephone set not send the tinkle of bells, and not influence normal talking.

Fig. 1 is a circuit composition frame chart of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment: as Fig. 1, shown in 2, the utility model comprises rectification circuit (1), phone ringing-current (AC signal) is converted to the AC-DC conversion DC power supply circuit (2) and the acoustics circuit (3) of DC power supply.Bridge rectifier (D ₁～D ₄) the user input (in) of input termination general telegraph circuit, the telephone line input port of machine and its output (out) is answered the call.The AC-DC conversion DC power supply circuit is made up of block isolating circuit, power rectifier circuit and filter circuit, and wherein block isolating circuit (adopts capacitance C ₁) the user input (in) of input termination general telegraph circuit, the AC signal output termination power rectifier circuit (D of capacitance ₅～D ₈), the output termination filter circuit (C of power rectifier circuit ₂), through filter capacitor C ₂Filtering signal output termination acoustics circuit, acoustics circuit is by IC ₁(1/3 CD40106), R ₁, R ₂, C ₃, C ₄, composition such as BU22.Its course of work is that the tinkle of bells electric current is through C when telephone line has telephone signal to insert ₁Every directly being coupled to by D ₅～D ₈The bridge rectifier of forming, and convert dc pulse signal output to, again through C ₂Obtain direct voltage comparatively stably after the filtering, this direct voltage is powered to acoustics circuit.Acoustics circuit is made up of the two-stage oscillator, when telephone signal inserts, just sends " dripping " sound when promptly acoustics circuit has power supply, informs that the user has phone to throw into.In addition, because D ₁～D ₄Rectified action, the tinkle of bells electric current is converted into direct voltage, and there is capacitance in the ring loop of original call machine, therefore original telephone set does not send the tinkle of bells.When telephone set was in talking state, the in end was direct voltage, because C ₁Effect make the AC-DC conversion DC power supply circuit not have direct voltage output, but C ₂On also remain with some voltages, this loss of voltage after after a while, acoustics circuit does not have power supply and promptly stops sounding, regulates C ₂Big I change the length of this time.

As connecing a change over switch between filter circuit and acoustics circuit, acoustics circuit establishes that music is integrated, " ding-dong " sound and " dripping " sound wait acoustics circuit, then can be by the required the tinkle of bells of any selection of user.

Claims

1. circumscribed ringing device comprises rectification circuit, DC power supply circuit and acoustics circuit, it is characterized in that

(1). the answer the call user input of circuit of the input of rectification circuit, the user input mouth of the telephone set telephone line that the output termination of rectification circuit is used;

(2) said DC power supply circuit is the AC-DC conversion DC power supply circuit that phone ringing-current (AC signal) is converted to DC power supply, comprise block isolating circuit, power rectifier circuit and filter circuit, the answer the call user input of circuit of the input of block isolating circuit, the AC signal output termination power rectifier circuit input of block isolating circuit, the rectified signal output termination filter circuit of power rectifier circuit, the filtering signal output termination acoustics circuit of filter circuit.

2. circumscribed ringing device as claimed in claim 1 is characterized in that said rectification circuit adopts diode bridge rectifier circuit or half-wave rectifying circuit.

3. circumscribed ringing device as claimed in claim 1 is characterized in that the power rectifier circuit in the AC-DC conversion DC power supply circuit adopts diode bridge rectifier circuit or half-wave rectifying circuit.

4. circumscribed ringing device as claimed in claim 1 is characterized in that block isolating circuit adopts capacitance.

5. circumscribed ringing device as claimed in claim 1 is characterized in that the input of capacitance or exports the termination current-limiting resistance.

6. circumscribed ringing device as claimed in claim 1 is characterized in that said acoustics circuit adopts music integrated audio circuit or " ding-dong " sound to ring circuit or " dripping " sound rings circuit or its combination.